76872380681857 has 4 divisors (see below), whose sum is σ = 78660110465200. Its totient is φ = 75084650898516.

The previous prime is 76872380681843. The next prime is 76872380681969. The reversal of 76872380681857 is 75818608327867.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76872380681857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76872380631857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 893864891607 + ... + 893864891692.

It is an arithmetic number, because the mean of its divisors is an integer number (19665027616300).

Almost surely, 2^{76872380681857} is an apocalyptic number.

It is an amenable number.

76872380681857 is a deficient number, since it is larger than the sum of its proper divisors (1787729783343).

76872380681857 is a wasteful number, since it uses less digits than its factorization.

76872380681857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787729783342.

The product of its (nonzero) digits is 1517322240, while the sum is 76.

The spelling of 76872380681857 in words is "seventy-six trillion, eight hundred seventy-two billion, three hundred eighty million, six hundred eighty-one thousand, eight hundred fifty-seven".