70577557621 has 2 divisors, whose sum is σ = 70577557622. Its totient is φ = 70577557620.

The previous prime is 70577557591. The next prime is 70577557627. The reversal of 70577557621 is 12675577507.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70124336100 + 453221521 = 264810^2 + 21289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70577557621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70577557627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35288778810 + 35288778811.

It is an arithmetic number, because the mean of its divisors is an integer number (35288778811).

Almost surely, 2^70577557621 is an apocalyptic number.

It is an amenable number.

70577557621 is a deficient number, since it is larger than the sum of its proper divisors (1).

70577557621 is an equidigital number, since it uses as much as digits as its factorization.

70577557621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3601500, while the sum is 52.

The spelling of 70577557621 in words is "seventy billion, five hundred seventy-seven million, five hundred fifty-seven thousand, six hundred twenty-one".