155969872 has 20 divisors (see below), whose sum is σ = 303866836. Its totient is φ = 77552640.

The previous prime is 155969867. The next prime is 155969887. The reversal of 155969872 is 278969551.

It can be written as a sum of positive squares in 2 ways, for example, as 14930496 + 141039376 = 3864^2 + 11876^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24033 + ... + 29824.

Almost surely, 2^155969872 is an apocalyptic number.

It is an amenable number.

155969872 is a deficient number, since it is larger than the sum of its proper divisors (147896964).

155969872 is a wasteful number, since it uses less digits than its factorization.

155969872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54046 (or 54040 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 52.

The square root of 155969872 is about 12488.7898533044. The cubic root of 155969872 is about 538.2866039712.

The spelling of 155969872 in words is "one hundred fifty-five million, nine hundred sixty-nine thousand, eight hundred seventy-two".