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43640506581420 = 2235731137130718719
BaseRepresentation
bin10011110110000110110001…
…11001001000000110101100
312201111222202221022212211010
421323003120321020012230
521210001224141101140
6232452101050425220
712122631302314320
oct1173033071100654
9181458687285733
1043640506581420
11129a5920294511
124a899a5432210
131b47388a55028
14aac2d720d980
1550a2ca4cd880
hex27b0d8e481ac

43640506581420 has 384 divisors, whose sum is σ = 145325532119040. Its totient is φ = 9574894909440.

The previous prime is 43640506581409. The next prime is 43640506581437. The reversal of 43640506581420 is 2418560504634.

It is a self number, because there is not a number n which added to its sum of digits gives 43640506581420.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2331338821 + ... + 2331357539.

It is an arithmetic number, because the mean of its divisors is an integer number (378451906560).

Almost surely, 243640506581420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43640506581420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72662766059520).

43640506581420 is an abundant number, since it is smaller than the sum of its proper divisors (101685025537620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43640506581420 is a wasteful number, since it uses less digits than its factorization.

43640506581420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20213 (or 20211 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 48.

The spelling of 43640506581420 in words is "forty-three trillion, six hundred forty billion, five hundred six million, five hundred eighty-one thousand, four hundred twenty".