261947124954 has 24 divisors (see below), whose sum is σ = 568129509792. Its totient is φ = 87226876680.

The previous prime is 261947124893. The next prime is 261947124973. The reversal of 261947124954 is 459421749162.

261947124954 is a `hidden beast` number, since 2 + 61 + 9 + 471 + 24 + 95 + 4 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 261947124954.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7384452 + ... + 7419839.

It is an arithmetic number, because the mean of its divisors is an integer number (23672062908).

Almost surely, 2^261947124954 is an apocalyptic number.

261947124954 is an abundant number, since it is smaller than the sum of its proper divisors (306182384838).

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

261947124954 is a wasteful number, since it uses less digits than its factorization.

261947124954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14805282 (or 14805279 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 261947124954 in words is "two hundred sixty-one billion, nine hundred forty-seven million, one hundred twenty-four thousand, nine hundred fifty-four".