74597279857 has 2 divisors, whose sum is σ = 74597279858. Its totient is φ = 74597279856.

The previous prime is 74597279851. The next prime is 74597279873. The reversal of 74597279857 is 75897279547.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47650087521 + 26947192336 = 218289^2 + 164156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74597279857 is a prime.

It is not a weakly prime, because it can be changed into another prime (74597279851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37298639928 + 37298639929.

It is an arithmetic number, because the mean of its divisors is an integer number (37298639929).

Almost surely, 2^74597279857 is an apocalyptic number.

It is an amenable number.

74597279857 is a deficient number, since it is larger than the sum of its proper divisors (1).

74597279857 is an equidigital number, since it uses as much as digits as its factorization.

74597279857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311169600, while the sum is 70.

The spelling of 74597279857 in words is "seventy-four billion, five hundred ninety-seven million, two hundred seventy-nine thousand, eight hundred fifty-seven".