155916640 has 48 divisors (see below), whose sum is σ = 401844240. Its totient is φ = 56696320.

The previous prime is 155916623. The next prime is 155916643. The reversal of 155916640 is 46619551.

It is a self number, because there is not a number n which added to its sum of digits gives 155916640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155916643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42535 + ... + 46054.

It is an arithmetic number, because the mean of its divisors is an integer number (8371755).

Almost surely, 2^155916640 is an apocalyptic number.

155916640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155916640 is an abundant number, since it is smaller than the sum of its proper divisors (245927600).

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

155916640 is a wasteful number, since it uses less digits than its factorization.

155916640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88615 (or 88607 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 155916640 is about 12486.6584801539. The cubic root of 155916640 is about 538.2253585255.

The spelling of 155916640 in words is "one hundred fifty-five million, nine hundred sixteen thousand, six hundred forty".