155623564 has 6 divisors (see below), whose sum is σ = 272341244. Its totient is φ = 77811780.

The previous prime is 155623561. The next prime is 155623571. The reversal of 155623564 is 465326551.

It is not an unprimeable number, because it can be changed into a prime (155623561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19452942 + ... + 19452949.

Almost surely, 2^155623564 is an apocalyptic number.

It is an amenable number.

155623564 is a deficient number, since it is larger than the sum of its proper divisors (116717680).

155623564 is a wasteful number, since it uses less digits than its factorization.

155623564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38905895 (or 38905893 counting only the distinct ones).

The product of its digits is 108000, while the sum is 37.

The square root of 155623564 is about 12474.9173945161. The cubic root of 155623564 is about 537.8879135217.

The spelling of 155623564 in words is "one hundred fifty-five million, six hundred twenty-three thousand, five hundred sixty-four".