1801079987640 has 192 divisors, whose sum is σ = 5886547292160. Its totient is φ = 440331621120.

The previous prime is 1801079987617. The next prime is 1801079987653. The reversal of 1801079987640 is 467899701081.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 672337 + ... + 2013503.

It is an arithmetic number, because the mean of its divisors is an integer number (30659100480).

Almost surely, 2^{1801079987640} is an apocalyptic number.

1801079987640 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 1801079987640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2943273646080).

1801079987640 is an abundant number, since it is smaller than the sum of its proper divisors (4085467304520).

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

1801079987640 is a wasteful number, since it uses less digits than its factorization.

1801079987640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341250 (or 1341227 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 60.

The spelling of 1801079987640 in words is "one trillion, eight hundred one billion, seventy-nine million, nine hundred eighty-seven thousand, six hundred forty".