78211023875 has 8 divisors (see below), whose sum is σ = 97607357952. Its totient is φ = 62568819000.

The previous prime is 78211023857. The next prime is 78211023883. The reversal of 78211023875 is 57832011287.

It is not a de Polignac number, because 78211023875 - 2²⁴ = 78194246659 is a prime.

It is a super-2 number, since 2×78211023875² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312843971 + ... + 312844220.

It is an arithmetic number, because the mean of its divisors is an integer number (12200919744).

Almost surely, 2^78211023875 is an apocalyptic number.

78211023875 is a deficient number, since it is larger than the sum of its proper divisors (19396334077).

78211023875 is an equidigital number, since it uses as much as digits as its factorization.

78211023875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625688206 (or 625688196 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 44.

The spelling of 78211023875 in words is "seventy-eight billion, two hundred eleven million, twenty-three thousand, eight hundred seventy-five".