261762242274 has 64 divisors (see below), whose sum is σ = 627038496000. Its totient is φ = 80465222016.

The previous prime is 261762242263. The next prime is 261762242369. The reversal of 261762242274 is 472242267162.

261762242274 is a `hidden beast` number, since 2 + 6 + 17 + 622 + 4 + 2 + 2 + 7 + 4 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 558667 + ... + 914129.

It is an arithmetic number, because the mean of its divisors is an integer number (9797476500).

Almost surely, 2^261762242274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261762242274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313519248000).

261762242274 is an abundant number, since it is smaller than the sum of its proper divisors (365276253726).

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

261762242274 is a wasteful number, since it uses less digits than its factorization.

261762242274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356536 (or 356530 counting only the distinct ones).

The product of its digits is 903168, while the sum is 45.

The spelling of 261762242274 in words is "two hundred sixty-one billion, seven hundred sixty-two million, two hundred forty-two thousand, two hundred seventy-four".