261931214286 has 48 divisors (see below), whose sum is σ = 648706422624. Its totient is φ = 74824238592.

The previous prime is 261931214257. The next prime is 261931214287. The reversal of 261931214286 is 682412139162.

261931214286 is a `hidden beast` number, since 2 + 619 + 3 + 1 + 2 + 1 + 4 + 28 + 6 = 666.

It is a super-2 number, since 2×261931214286² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261931214287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 541686 + ... + 904038.

It is an arithmetic number, because the mean of its divisors is an integer number (13514717138).

Almost surely, 2^261931214286 is an apocalyptic number.

261931214286 is an abundant number, since it is smaller than the sum of its proper divisors (386775208338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261931214286 is a wasteful number, since it uses less digits than its factorization.

261931214286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368105 (or 368102 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 261931214286 in words is "two hundred sixty-one billion, nine hundred thirty-one million, two hundred fourteen thousand, two hundred eighty-six".