261696702970 has 8 divisors (see below), whose sum is σ = 471054065364. Its totient is φ = 104678681184.

The previous prime is 261696702959. The next prime is 261696702997. The reversal of 261696702970 is 79207696162.

It is a Cunningham number, because it is equal to 511563²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 261696702969 + 1 = 511563^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13084835139 + ... + 13084835158.

Almost surely, 2^261696702970 is an apocalyptic number.

261696702970 is a deficient number, since it is larger than the sum of its proper divisors (209357362394).

261696702970 is a wasteful number, since it uses less digits than its factorization.

261696702970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26169670304.

The product of its (nonzero) digits is 3429216, while the sum is 55.

The spelling of 261696702970 in words is "two hundred sixty-one billion, six hundred ninety-six million, seven hundred two thousand, nine hundred seventy".