155920864 has 48 divisors (see below), whose sum is σ = 349453440. Its totient is φ = 67788160.

The previous prime is 155920861. The next prime is 155920867. The reversal of 155920864 is 468029551.

It is an interprime number because it is at equal distance from previous prime (155920861) and next prime (155920867).

It is a super-2 number, since 2×155920864² = 48622631661012992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155920861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1534 + ... + 17725.

It is an arithmetic number, because the mean of its divisors is an integer number (7280280).

Almost surely, 2^155920864 is an apocalyptic number.

It is an amenable number.

155920864 is an abundant number, since it is smaller than the sum of its proper divisors (193532576).

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

155920864 is a wasteful number, since it uses less digits than its factorization.

155920864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19303 (or 19295 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 155920864 is about 12486.8276195357. The cubic root of 155920864 is about 538.2302189077.

The spelling of 155920864 in words is "one hundred fifty-five million, nine hundred twenty thousand, eight hundred sixty-four".