155564136 has 96 divisors (see below), whose sum is σ = 518568960. Its totient is φ = 41026176.

The previous prime is 155564119. The next prime is 155564137. The reversal of 155564136 is 631465551.

155564136 is a `hidden beast` number, since 1 + 5 + 5 + 5 + 641 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 155564136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155564137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5320 + ... + 18423.

It is an arithmetic number, because the mean of its divisors is an integer number (5401760).

Almost surely, 2^155564136 is an apocalyptic number.

It is an amenable number.

155564136 is an abundant number, since it is smaller than the sum of its proper divisors (363004824).

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

155564136 is a wasteful number, since it uses less digits than its factorization.

155564136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23775 (or 23768 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 155564136 is about 12472.5352675388. The cubic root of 155564136 is about 537.8194370179.

The spelling of 155564136 in words is "one hundred fifty-five million, five hundred sixty-four thousand, one hundred thirty-six".