28671167370825 has 72 divisors (see below), whose sum is σ = 58905991529216. Its totient is φ = 13058454528000.

The previous prime is 28671167370757. The next prime is 28671167370841. The reversal of 28671167370825 is 52807376117682.

It is a happy number.

28671167370825 is a `hidden beast` number, since 2 + 86 + 7 + 1 + 167 + 370 + 8 + 25 = 666.

It is not a de Polignac number, because 28671167370825 - 2⁷ = 28671167370697 is a prime.

It is a super-2 number, since 2×28671167370825² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 33159736 + ... + 34013385.

Almost surely, 2^{28671167370825} is an apocalyptic number.

28671167370825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28671167370825 is an abundant number, since it is smaller than the sum of its proper divisors (30234824158391).

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

28671167370825 is a wasteful number, since it uses less digits than its factorization.

28671167370825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67173415 (or 67173407 counting only the distinct ones).

The product of its (nonzero) digits is 47416320, while the sum is 63.

The spelling of 28671167370825 in words is "twenty-eight trillion, six hundred seventy-one billion, one hundred sixty-seven million, three hundred seventy thousand, eight hundred twenty-five".