70825431577 has 2 divisors, whose sum is σ = 70825431578. Its totient is φ = 70825431576.

The previous prime is 70825431563. The next prime is 70825431601. The reversal of 70825431577 is 77513452807.

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., 54298786441 + 16526645136 = 233021^2 + 128556^2 .

It is a cyclic number.

It is not a de Polignac number, because 70825431577 - 2⁷ = 70825431449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70825431577.

It is not a weakly prime, because it can be changed into another prime (70825431517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35412715788 + 35412715789.

It is an arithmetic number, because the mean of its divisors is an integer number (35412715789).

Almost surely, 2^70825431577 is an apocalyptic number.

It is an amenable number.

70825431577 is a deficient number, since it is larger than the sum of its proper divisors (1).

70825431577 is an equidigital number, since it uses as much as digits as its factorization.

70825431577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1646400, while the sum is 49.

The spelling of 70825431577 in words is "seventy billion, eight hundred twenty-five million, four hundred thirty-one thousand, five hundred seventy-seven".