261472613356 has 48 divisors (see below), whose sum is σ = 475170312960. Its totient is φ = 125791315200.

The previous prime is 261472613351. The next prime is 261472613411. The reversal of 261472613356 is 653316274162.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (261472613351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12889990 + ... + 12910258.

It is an arithmetic number, because the mean of its divisors is an integer number (9899381520).

Almost surely, 2^261472613356 is an apocalyptic number.

It is an amenable number.

261472613356 is a deficient number, since it is larger than the sum of its proper divisors (213697699604).

261472613356 is a wasteful number, since it uses less digits than its factorization.

261472613356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21274 (or 21272 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 46.

The spelling of 261472613356 in words is "two hundred sixty-one billion, four hundred seventy-two million, six hundred thirteen thousand, three hundred fifty-six".