261562134455212 has 24 divisors (see below), whose sum is σ = 477750601440000. Its totient is φ = 125064710219856.

The previous prime is 261562134455201. The next prime is 261562134455213. The reversal of 261562134455212 is 212554431265162.

It is not an unprimeable number, because it can be changed into a prime (261562134455213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343067712 + ... + 343829287.

It is an arithmetic number, because the mean of its divisors is an integer number (19906275060000).

Almost surely, 2^{261562134455212} is an apocalyptic number.

It is an amenable number.

261562134455212 is a deficient number, since it is larger than the sum of its proper divisors (216188466984788).

261562134455212 is a wasteful number, since it uses less digits than its factorization.

261562134455212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686901165 (or 686901163 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 49.

The spelling of 261562134455212 in words is "two hundred sixty-one trillion, five hundred sixty-two billion, one hundred thirty-four million, four hundred fifty-five thousand, two hundred twelve".