70157706543521 has 2 divisors, whose sum is σ = 70157706543522. Its totient is φ = 70157706543520.

The previous prime is 70157706543517. The next prime is 70157706543601. The reversal of 70157706543521 is 12534560775107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48648183780625 + 21509522762896 = 6974825^2 + 4637836^2 .

It is a cyclic number.

It is not a de Polignac number, because 70157706543521 - 2² = 70157706543517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35078853271760 + 35078853271761.

It is an arithmetic number, because the mean of its divisors is an integer number (35078853271761).

Almost surely, 2^{70157706543521} is an apocalyptic number.

It is an amenable number.

70157706543521 is a deficient number, since it is larger than the sum of its proper divisors (1).

70157706543521 is an equidigital number, since it uses as much as digits as its factorization.

70157706543521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6174000, while the sum is 53.

The spelling of 70157706543521 in words is "seventy trillion, one hundred fifty-seven billion, seven hundred six million, five hundred forty-three thousand, five hundred twenty-one".