70506711961 has 15 divisors (see below), whose sum is σ = 82268117781. Its totient is φ = 60423172236.

The previous prime is 70506711923. The next prime is 70506711971. The reversal of 70506711961 is 16911760507.

The square root of 70506711961 is 265531.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 70506711961 - 2⁷ = 70506711833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70506711901) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 13008310 + ... + 13013728.

Almost surely, 2^70506711961 is an apocalyptic number.

70506711961 is the 265531-st square number.

70506711961 is the 132766-th centered octagonal number.

It is an amenable number.

70506711961 is a deficient number, since it is larger than the sum of its proper divisors (11761405820).

70506711961 is an frugal number, since it uses more digits than its factorization.

70506711961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10866 (or 5426 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 43.

The spelling of 70506711961 in words is "seventy billion, five hundred six million, seven hundred eleven thousand, nine hundred sixty-one".