155506656100 has 18 divisors (see below), whose sum is σ = 337449443954. Its totient is φ = 62202662400.

The previous prime is 155506656049. The next prime is 155506656161. The reversal of 155506656100 is 1656605551.

It can be written as a sum of positive squares in 3 ways, for example, as 1046651904 + 154460004196 = 32352^2 + 393014^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 777533181 + ... + 777533380.

Almost surely, 2^155506656100 is an apocalyptic number.

155506656100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155506656100 is an abundant number, since it is smaller than the sum of its proper divisors (181942787854).

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

155506656100 is a wasteful number, since it uses less digits than its factorization.

155506656100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555066575 (or 1555066568 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 155506656100 in words is "one hundred fifty-five billion, five hundred six million, six hundred fifty-six thousand, one hundred".