261954546772 has 12 divisors (see below), whose sum is σ = 469081398016. Its totient is φ = 127931290200.

The previous prime is 261954546761. The next prime is 261954546797. The reversal of 261954546772 is 277645459162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 761495604 + ... + 761495947.

Almost surely, 2^261954546772 is an apocalyptic number.

It is an amenable number.

261954546772 is a deficient number, since it is larger than the sum of its proper divisors (207126851244).

261954546772 is a wasteful number, since it uses less digits than its factorization.

261954546772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522991598 (or 1522991596 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 58.

The spelling of 261954546772 in words is "two hundred sixty-one billion, nine hundred fifty-four million, five hundred forty-six thousand, seven hundred seventy-two".