64139855893146 has 48 divisors (see below), whose sum is σ = 151616742226560. Its totient is φ = 19434596060160.

The previous prime is 64139855893067. The next prime is 64139855893163.

It is a happy number.

64139855893146 is a `hidden beast` number, since 6 + 4 + 1 + 3 + 9 + 8 + 5 + 589 + 31 + 4 + 6 = 666.

64139855893146 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×64139855893146² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12127015 + ... + 16593498.

It is an arithmetic number, because the mean of its divisors is an integer number (3158682129720).

Almost surely, 2^{64139855893146} is an apocalyptic number.

64139855893146 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

64139855893146 is an abundant number, since it is smaller than the sum of its proper divisors (87476886333414).

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

64139855893146 is a wasteful number, since it uses less digits than its factorization.

64139855893146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28731811 (or 28731808 counting only the distinct ones).

The product of its digits is 671846400, while the sum is 72.

The spelling of 64139855893146 in words is "sixty-four trillion, one hundred thirty-nine billion, eight hundred fifty-five million, eight hundred ninety-three thousand, one hundred forty-six".