261220992932 has 12 divisors (see below), whose sum is σ = 469491784860. Its totient is φ = 127080482976.

The previous prime is 261220992917. The next prime is 261220992943. The reversal of 261220992932 is 239299022162.

It can be written as a sum of positive squares in 2 ways, for example, as 144807647296 + 116413345636 = 380536^2 + 341194^2 .

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, 882503207 + ... + 882503502.

It is an arithmetic number, because the mean of its divisors is an integer number (39124315405).

Almost surely, 2^261220992932 is an apocalyptic number.

It is an amenable number.

261220992932 is a deficient number, since it is larger than the sum of its proper divisors (208270791928).

261220992932 is a wasteful number, since it uses less digits than its factorization.

261220992932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765006750 (or 1765006748 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 261220992932 in words is "two hundred sixty-one billion, two hundred twenty million, nine hundred ninety-two thousand, nine hundred thirty-two".