501964155 has 128 divisors (see below), whose sum is σ = 1139466240. Its totient is φ = 203575680.

The previous prime is 501964139. The next prime is 501964231. The reversal of 501964155 is 551469105.

501964155 is a `hidden beast` number, since 5 + 0 + 1 + 9 + 641 + 5 + 5 = 666.

It is not a de Polignac number, because 501964155 - 2⁴ = 501964139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 446424 + ... + 447546.

It is an arithmetic number, because the mean of its divisors is an integer number (8902080).

Almost surely, 2^501964155 is an apocalyptic number.

501964155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

501964155 is an abundant number, since it is smaller than the sum of its proper divisors (637502085).

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

501964155 is a wasteful number, since it uses less digits than its factorization.

501964155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198 (or 1192 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 501964155 is about 22404.5565678056. The cubic root of 501964155 is about 794.7384686192.

It can be divided in two parts, 5019641 and 55, that added together give a triangular number (5019696 = T₃₁₆₈).

The spelling of 501964155 in words is "five hundred one million, nine hundred sixty-four thousand, one hundred fifty-five".