Search a number
-
+
11982561280 = 21351989173
BaseRepresentation
bin10110010100011011…
…10110000000000000
31010221002022011220221
423022031312000000
5144020013430110
65301003512424
7602640042664
oct131215660000
933832264827
1011982561280
115099930708
1223a4b28714
13118c66a161
1481959c8a4
154a1e787da
hex2ca376000

11982561280 has 224 divisors, whose sum is σ = 30786933600. Its totient is φ = 4463788032.

The previous prime is 11982561263. The next prime is 11982561307. The reversal of 11982561280 is 8216528911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69263274 + ... + 69263446.

Almost surely, 211982561280 is an apocalyptic number.

11982561280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11982561280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15393466800).

11982561280 is an abundant number, since it is smaller than the sum of its proper divisors (18804372320).

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

11982561280 is an equidigital number, since it uses as much as digits as its factorization.

11982561280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 43.

The spelling of 11982561280 in words is "eleven billion, nine hundred eighty-two million, five hundred sixty-one thousand, two hundred eighty".