155920885 has 8 divisors (see below), whose sum is σ = 188922240. Its totient is φ = 123525264.

The previous prime is 155920883. The next prime is 155920927. The reversal of 155920885 is 588029551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155920885 - 2¹ = 155920883 is a prime.

It is a super-2 number, since 2×155920885² = 48622644758366450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155920883) 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, 150865 + ... + 151894.

It is an arithmetic number, because the mean of its divisors is an integer number (23615280).

Almost surely, 2^155920885 is an apocalyptic number.

It is an amenable number.

155920885 is a deficient number, since it is larger than the sum of its proper divisors (33001355).

155920885 is a wasteful number, since it uses less digits than its factorization.

155920885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302867.

The product of its (nonzero) digits is 144000, while the sum is 43.

The square root of 155920885 is about 12486.8284604218. The cubic root of 155920885 is about 538.2302430714.

The spelling of 155920885 in words is "one hundred fifty-five million, nine hundred twenty thousand, eight hundred eighty-five".