261432207070660 has 24 divisors (see below), whose sum is σ = 550198540800216. Its totient is φ = 104346043599360.

The previous prime is 261432207070577. The next prime is 261432207070717. The reversal of 261432207070660 is 66070702234162.

It can be written as a sum of positive squares in 4 ways, for example, as 60296218924096 + 201135988146564 = 7765064^2 + 14182242^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 261432207070660.

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, 14177442357 + ... + 14177460796.

It is an arithmetic number, because the mean of its divisors is an integer number (22924939200009).

Almost surely, 2^{261432207070660} is an apocalyptic number.

261432207070660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261432207070660 is an abundant number, since it is smaller than the sum of its proper divisors (288766333729556).

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

261432207070660 is a wasteful number, since it uses less digits than its factorization.

261432207070660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28354903623 (or 28354903621 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 46.

The spelling of 261432207070660 in words is "two hundred sixty-one trillion, four hundred thirty-two billion, two hundred seven million, seventy thousand, six hundred sixty".