261299601682 has 8 divisors (see below), whose sum is σ = 447942174336. Its totient is φ = 111985543572.

The previous prime is 261299601659. The next prime is 261299601691. The reversal of 261299601682 is 286106992162.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 9332128618 + ... + 9332128645.

It is an arithmetic number, because the mean of its divisors is an integer number (55992771792).

Almost surely, 2^261299601682 is an apocalyptic number.

261299601682 is a deficient number, since it is larger than the sum of its proper divisors (186642572654).

261299601682 is a wasteful number, since it uses less digits than its factorization.

261299601682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18664257272.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 261299601682 in words is "two hundred sixty-one billion, two hundred ninety-nine million, six hundred one thousand, six hundred eighty-two".