70778805057 has 24 divisors (see below), whose sum is σ = 108360964296. Its totient is φ = 44364681216.

The previous prime is 70778805043. The next prime is 70778805059. The reversal of 70778805057 is 75050887707.

It can be written as a sum of positive squares in 4 ways, for example, as 22926805056 + 47852000001 = 151416^2 + 218751^2 .

It is not a de Polignac number, because 70778805057 - 2⁸ = 70778804801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70778804994 and 70778805012.

It is not an unprimeable number, because it can be changed into a prime (70778805059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87268 + ... + 386229.

It is an arithmetic number, because the mean of its divisors is an integer number (4515040179).

Almost surely, 2^70778805057 is an apocalyptic number.

It is an amenable number.

70778805057 is a deficient number, since it is larger than the sum of its proper divisors (37582159239).

70778805057 is a wasteful number, since it uses less digits than its factorization.

70778805057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474497 (or 474494 counting only the distinct ones).

The product of its (nonzero) digits is 3841600, while the sum is 54.

The spelling of 70778805057 in words is "seventy billion, seven hundred seventy-eight million, eight hundred five thousand, fifty-seven".