261276634708670 has 32 divisors (see below), whose sum is σ = 540590203101888. Its totient is φ = 89062753759488.

The previous prime is 261276634708627. The next prime is 261276634708769. The reversal of 261276634708670 is 76807436672162.

It is a junction number, because it is equal to n+sod(n) for n = 261276634708597 and 261276634708606.

It is a congruent number.

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, 10787627639 + ... + 10787651858.

It is an arithmetic number, because the mean of its divisors is an integer number (16893443846934).

Almost surely, 2^{261276634708670} is an apocalyptic number.

261276634708670 is an abundant number, since it is smaller than the sum of its proper divisors (279313568393218).

261276634708670 is a wasteful number, since it uses less digits than its factorization.

261276634708670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21575279684.

The product of its (nonzero) digits is 170698752, while the sum is 65.

The spelling of 261276634708670 in words is "two hundred sixty-one trillion, two hundred seventy-six billion, six hundred thirty-four million, seven hundred eight thousand, six hundred seventy".