261631454322 has 16 divisors (see below), whose sum is σ = 598014752832. Its totient is φ = 74751844080.

The previous prime is 261631454309. The next prime is 261631454387. The reversal of 261631454322 is 223454136162.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3114660129 + ... + 3114660212.

It is an arithmetic number, because the mean of its divisors is an integer number (37375922052).

Almost surely, 2^261631454322 is an apocalyptic number.

261631454322 is an abundant number, since it is smaller than the sum of its proper divisors (336383298510).

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

261631454322 is a wasteful number, since it uses less digits than its factorization.

261631454322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6229320353.

The product of its digits is 207360, while the sum is 39.

The spelling of 261631454322 in words is "two hundred sixty-one billion, six hundred thirty-one million, four hundred fifty-four thousand, three hundred twenty-two".