261733916672 has 28 divisors (see below), whose sum is σ = 523435899786. Its totient is φ = 130866954240.

The previous prime is 261733916671. The next prime is 261733916693. The reversal of 261733916672 is 276619337162.

It can be written as a sum of positive squares in only one way, i.e., 241528999936 + 20204916736 = 491456^2 + 142144^2 .

It is not an unprimeable number, because it can be changed into a prime (261733916671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15966779 + ... + 15983162.

Almost surely, 2^261733916672 is an apocalyptic number.

It is an amenable number.

261733916672 is a deficient number, since it is larger than the sum of its proper divisors (261701983114).

261733916672 is an frugal number, since it uses more digits than its factorization.

261733916672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31949967 (or 31949943 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 53.

The spelling of 261733916672 in words is "two hundred sixty-one billion, seven hundred thirty-three million, nine hundred sixteen thousand, six hundred seventy-two".