155564634 has 16 divisors (see below), whose sum is σ = 321166080. Its totient is φ = 50182080.

The previous prime is 155564627. The next prime is 155564653. The reversal of 155564634 is 436465551.

155564634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 155564592 and 155564601.

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, 417999 + ... + 418370.

It is an arithmetic number, because the mean of its divisors is an integer number (20072880).

Almost surely, 2^155564634 is an apocalyptic number.

155564634 is an abundant number, since it is smaller than the sum of its proper divisors (165601446).

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

155564634 is a wasteful number, since it uses less digits than its factorization.

155564634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836405.

The product of its digits is 216000, while the sum is 39.

The square root of 155564634 is about 12472.5552313870. Note that the first 3 decimals coincide. The cubic root of 155564634 is about 537.8200109158.

The spelling of 155564634 in words is "one hundred fifty-five million, five hundred sixty-four thousand, six hundred thirty-four".