261458064 has 80 divisors (see below), whose sum is σ = 857703040. Its totient is φ = 74701440.

The previous prime is 261458023. The next prime is 261458101. The reversal of 261458064 is 460854162.

261458064 is a `hidden beast` number, since 2 + 6 + 14 + 580 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40207 + ... + 46254.

It is an arithmetic number, because the mean of its divisors is an integer number (10721288).

Almost surely, 2^261458064 is an apocalyptic number.

261458064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

261458064 is an abundant number, since it is smaller than the sum of its proper divisors (596244976).

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

261458064 is a wasteful number, since it uses less digits than its factorization.

261458064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86485 (or 86473 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 261458064 is about 16169.6649315934. The cubic root of 261458064 is about 639.4412962619.

The spelling of 261458064 in words is "two hundred sixty-one million, four hundred fifty-eight thousand, sixty-four".