261552507236476 has 24 divisors (see below), whose sum is σ = 460043536795920. Its totient is φ = 130111505997312.

The previous prime is 261552507236369. The next prime is 261552507236477. The reversal of 261552507236476 is 674632705255162.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261552507236477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119728155 + ... + 121893133.

It is an arithmetic number, because the mean of its divisors is an integer number (19168480699830).

Almost surely, 2^{261552507236476} is an apocalyptic number.

It is an amenable number.

261552507236476 is a deficient number, since it is larger than the sum of its proper divisors (198491029559444).

261552507236476 is a wasteful number, since it uses less digits than its factorization.

261552507236476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318493 (or 2318491 counting only the distinct ones).

The product of its (nonzero) digits is 127008000, while the sum is 61.

The spelling of 261552507236476 in words is "two hundred sixty-one trillion, five hundred fifty-two billion, five hundred seven million, two hundred thirty-six thousand, four hundred seventy-six".