261061092474 has 64 divisors (see below), whose sum is σ = 659979860736. Its totient is φ = 66990426624.

The previous prime is 261061092469. The next prime is 261061092491. The reversal of 261061092474 is 474290160162.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6441067 + ... + 6481470.

It is an arithmetic number, because the mean of its divisors is an integer number (10312185324).

Almost surely, 2^261061092474 is an apocalyptic number.

261061092474 is an abundant number, since it is smaller than the sum of its proper divisors (398918768262).

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

261061092474 is a wasteful number, since it uses less digits than its factorization.

261061092474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12922599.

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 261061092474 in words is "two hundred sixty-one billion, sixty-one million, ninety-two thousand, four hundred seventy-four".