69406831961 has 2 divisors, whose sum is σ = 69406831962. Its totient is φ = 69406831960.

The previous prime is 69406831939. The next prime is 69406831979. The reversal of 69406831961 is 16913860496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57399055561 + 12007776400 = 239581^2 + 109580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69406831961 is a prime.

It is a super-2 number, since 2×69406831961² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (69406831561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34703415980 + 34703415981.

It is an arithmetic number, because the mean of its divisors is an integer number (34703415981).

Almost surely, 2^69406831961 is an apocalyptic number.

It is an amenable number.

69406831961 is a deficient number, since it is larger than the sum of its proper divisors (1).

69406831961 is an equidigital number, since it uses as much as digits as its factorization.

69406831961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 69406831961 in words is "sixty-nine billion, four hundred six million, eight hundred thirty-one thousand, nine hundred sixty-one".