78620467057 has 4 divisors (see below), whose sum is σ = 85767782256. Its totient is φ = 71473151860.

The previous prime is 78620467049. The next prime is 78620467111. The reversal of 78620467057 is 75076402687.

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 not a de Polignac number, because 78620467057 - 2³ = 78620467049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78620466995 and 78620467013.

It is not an unprimeable number, because it can be changed into a prime (78620467357) 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, 3573657583 + ... + 3573657604.

It is an arithmetic number, because the mean of its divisors is an integer number (21441945564).

Almost surely, 2^78620467057 is an apocalyptic number.

It is an amenable number.

78620467057 is a deficient number, since it is larger than the sum of its proper divisors (7147315199).

78620467057 is a wasteful number, since it uses less digits than its factorization.

78620467057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7147315198.

The product of its (nonzero) digits is 3951360, while the sum is 52.

The spelling of 78620467057 in words is "seventy-eight billion, six hundred twenty million, four hundred sixty-seven thousand, fifty-seven".