155630656 has 14 divisors (see below), whose sum is σ = 308829710. Its totient is φ = 77815296.

The previous prime is 155630647. The next prime is 155630669. The reversal of 155630656 is 656036551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 99680256 + 55950400 = 9984^2 + 7480^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1215801 + ... + 1215928.

It is an arithmetic number, because the mean of its divisors is an integer number (22059265).

Almost surely, 2^155630656 is an apocalyptic number.

155630656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

155630656 is a deficient number, since it is larger than the sum of its proper divisors (153199054).

155630656 is an equidigital number, since it uses as much as digits as its factorization.

155630656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431741 (or 2431731 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 155630656 is about 12475.2016416569. The cubic root of 155630656 is about 537.8960841848.

The spelling of 155630656 in words is "one hundred fifty-five million, six hundred thirty thousand, six hundred fifty-six".