75390757657 has 2 divisors, whose sum is σ = 75390757658. Its totient is φ = 75390757656.

The previous prime is 75390757649. The next prime is 75390757679. The reversal of 75390757657 is 75675709357.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75253656976 + 137100681 = 274324^2 + 11709^2 .

It is an emirp because it is prime and its reverse (75675709357) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75390757657 - 2³ = 75390757649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75390757595 and 75390757604.

It is not a weakly prime, because it can be changed into another prime (75360757657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37695378828 + 37695378829.

It is an arithmetic number, because the mean of its divisors is an integer number (37695378829).

Almost surely, 2^75390757657 is an apocalyptic number.

It is an amenable number.

75390757657 is a deficient number, since it is larger than the sum of its proper divisors (1).

75390757657 is an equidigital number, since it uses as much as digits as its factorization.

75390757657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48620250, while the sum is 61.

The spelling of 75390757657 in words is "seventy-five billion, three hundred ninety million, seven hundred fifty-seven thousand, six hundred fifty-seven".