155637941640 has 32 divisors (see below), whose sum is σ = 466913825280. Its totient is φ = 41503451072.

The previous prime is 155637941597. The next prime is 155637941659. The reversal of 155637941640 is 46149736551.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648491304 + ... + 648491543.

It is an arithmetic number, because the mean of its divisors is an integer number (14591057040).

Almost surely, 2^155637941640 is an apocalyptic number.

155637941640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155637941640 is an abundant number, since it is smaller than the sum of its proper divisors (311275883640).

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

155637941640 is a wasteful number, since it uses less digits than its factorization.

155637941640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296982861 (or 1296982857 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 155637941640 in words is "one hundred fifty-five billion, six hundred thirty-seven million, nine hundred forty-one thousand, six hundred forty".