31969797601 has 45 divisors (see below), whose sum is σ = 38662071353. Its totient is φ = 26433939840.

The previous prime is 31969797557. The next prime is 31969797641. The reversal of 31969797601 is 10679796913.

The square root of 31969797601 is 178801.

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

It can be written as a sum of positive squares in 4 ways, for example, as 19488439201 + 12481358400 = 139601^2 + 111720^2 .

It is not a de Polignac number, because 31969797601 - 2⁷ = 31969797473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31969797641) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 359211165 + ... + 359211253.

Almost surely, 2^31969797601 is an apocalyptic number.

31969797601 is the 178801-st square number.

31969797601 is the 89401-st centered octagonal number.

It is an amenable number.

31969797601 is a deficient number, since it is larger than the sum of its proper divisors (6692273752).

31969797601 is an frugal number, since it uses more digits than its factorization.

31969797601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 3857868, while the sum is 58.

The spelling of 31969797601 in words is "thirty-one billion, nine hundred sixty-nine million, seven hundred ninety-seven thousand, six hundred one".