261450144157464 has 48 divisors (see below), whose sum is σ = 718067297347920. Its totient is φ = 85922582585280.

The previous prime is 261450144157459. The next prime is 261450144157493. The reversal of 261450144157464 is 464751441054162.

261450144157464 is a `hidden beast` number, since 2 + 6 + 1 + 4 + 5 + 0 + 1 + 4 + 4 + 1 + 574 + 64 = 666.

It is a super-2 number, since 2×261450144157464² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261450144157464.

It is a congruent number.

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, 25572192087 + ... + 25572202310.

It is an arithmetic number, because the mean of its divisors is an integer number (14959735361415).

Almost surely, 2^{261450144157464} is an apocalyptic number.

261450144157464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

261450144157464 is an abundant number, since it is smaller than the sum of its proper divisors (456617153190456).

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

261450144157464 is a wasteful number, since it uses less digits than its factorization.

261450144157464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51144394480 (or 51144394473 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 54.

The spelling of 261450144157464 in words is "two hundred sixty-one trillion, four hundred fifty billion, one hundred forty-four million, one hundred fifty-seven thousand, four hundred sixty-four".