64117156850 has 12 divisors (see below), whose sum is σ = 119257911834. Its totient is φ = 25646862720.

The previous prime is 64117156823. The next prime is 64117156889. The reversal of 64117156850 is 5865171146.

It can be written as a sum of positive squares in 3 ways, for example, as 44143270609 + 19973886241 = 210103^2 + 141329^2 .

It is a super-2 number, since 2×64117156850² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 641171519 + ... + 641171618.

Almost surely, 2^64117156850 is an apocalyptic number.

64117156850 is a deficient number, since it is larger than the sum of its proper divisors (55140754984).

64117156850 is a wasteful number, since it uses less digits than its factorization.

64117156850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282343149 (or 1282343144 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 44.

The spelling of 64117156850 in words is "sixty-four billion, one hundred seventeen million, one hundred fifty-six thousand, eight hundred fifty".