2108578656625 has 32 divisors (see below), whose sum is σ = 3184343615232. Its totient is φ = 1360830585600.

The previous prime is 2108578656623. The next prime is 2108578656673. The reversal of 2108578656625 is 5266568758012.

It is not a de Polignac number, because 2108578656625 - 2¹ = 2108578656623 is a prime.

It is a super-2 number, since 2×2108578656625² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2108578656623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70861719 + ... + 70891468.

It is an arithmetic number, because the mean of its divisors is an integer number (99510737976).

Almost surely, 2^{2108578656625} is an apocalyptic number.

2108578656625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2108578656625 is a deficient number, since it is larger than the sum of its proper divisors (1075764958607).

2108578656625 is a wasteful number, since it uses less digits than its factorization.

2108578656625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141753226 (or 141753216 counting only the distinct ones).

The product of its (nonzero) digits is 48384000, while the sum is 61.

The spelling of 2108578656625 in words is "two trillion, one hundred eight billion, five hundred seventy-eight million, six hundred fifty-six thousand, six hundred twenty-five".