155864868 has 24 divisors (see below), whose sum is σ = 373515072. Its totient is φ = 50550624.

The previous prime is 155864851. The next prime is 155864873. The reversal of 155864868 is 868468551.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 155864868.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175080 + ... + 175967.

It is an arithmetic number, because the mean of its divisors is an integer number (15563128).

Almost surely, 2^155864868 is an apocalyptic number.

It is an amenable number.

155864868 is an abundant number, since it is smaller than the sum of its proper divisors (217650204).

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

155864868 is a wasteful number, since it uses less digits than its factorization.

155864868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351091 (or 351089 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 51.

The square root of 155864868 is about 12484.5852153766. The cubic root of 155864868 is about 538.1657794923.

The spelling of 155864868 in words is "one hundred fifty-five million, eight hundred sixty-four thousand, eight hundred sixty-eight".