961709501871 has 12 divisors (see below), whose sum is σ = 1389391233048. Its totient is φ = 641021843664.

The previous prime is 961709501843. The next prime is 961709501903. The reversal of 961709501871 is 178105907169.

961709501871 is a `hidden beast` number, since 9 + 61 + 7 + 0 + 9 + 501 + 8 + 71 = 666.

It is not a de Polignac number, because 961709501871 - 2⁶ = 961709501807 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961709501171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9766980 + ... + 9864953.

It is an arithmetic number, because the mean of its divisors is an integer number (115782602754).

Almost surely, 2^961709501871 is an apocalyptic number.

961709501871 is a deficient number, since it is larger than the sum of its proper divisors (427681731177).

961709501871 is a wasteful number, since it uses less digits than its factorization.

961709501871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19637382 (or 19637379 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 54.

The spelling of 961709501871 in words is "nine hundred sixty-one billion, seven hundred nine million, five hundred one thousand, eight hundred seventy-one".