261154253464 has 32 divisors (see below), whose sum is σ = 529291098000. Its totient is φ = 120084642432.

The previous prime is 261154253447. The next prime is 261154253489. The reversal of 261154253464 is 464352451162.

It is a super-3 number, since 3×261154253464³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261154253464.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4639494 + ... + 4695445.

Almost surely, 2^261154253464 is an apocalyptic number.

It is an amenable number.

261154253464 is an abundant number, since it is smaller than the sum of its proper divisors (268136844536).

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

261154253464 is a wasteful number, since it uses less digits than its factorization.

261154253464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9335227 (or 9335223 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The spelling of 261154253464 in words is "two hundred sixty-one billion, one hundred fifty-four million, two hundred fifty-three thousand, four hundred sixty-four".