261164452115 has 32 divisors (see below), whose sum is σ = 366739716096. Its totient is φ = 174847518720.

The previous prime is 261164452067. The next prime is 261164452181. The reversal of 261164452115 is 511254461162.

It is not a de Polignac number, because 261164452115 - 2⁸ = 261164451859 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254222 + ... + 766131.

It is an arithmetic number, because the mean of its divisors is an integer number (11460616128).

Almost surely, 2^261164452115 is an apocalyptic number.

261164452115 is a deficient number, since it is larger than the sum of its proper divisors (105575263981).

261164452115 is a wasteful number, since it uses less digits than its factorization.

261164452115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020539.

The product of its digits is 57600, while the sum is 38.

The spelling of 261164452115 in words is "two hundred sixty-one billion, one hundred sixty-four million, four hundred fifty-two thousand, one hundred fifteen".