261440915468 has 12 divisors (see below), whose sum is σ = 457624147680. Its totient is φ = 130691158992.

The previous prime is 261440915459. The next prime is 261440915503. The reversal of 261440915468 is 864519044162.

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, 7304603 + ... + 7340306.

It is an arithmetic number, because the mean of its divisors is an integer number (38135345640).

Almost surely, 2^261440915468 is an apocalyptic number.

It is an amenable number.

261440915468 is a deficient number, since it is larger than the sum of its proper divisors (196183232212).

261440915468 is a wasteful number, since it uses less digits than its factorization.

261440915468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14649376 (or 14649374 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 261440915468 in words is "two hundred sixty-one billion, four hundred forty million, nine hundred fifteen thousand, four hundred sixty-eight".