261103154504 has 16 divisors (see below), whose sum is σ = 489742124400. Its totient is φ = 130505254672.

The previous prime is 261103154467. The next prime is 261103154519. The reversal of 261103154504 is 405451301162.

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, 5766362 + ... + 5811465.

It is an arithmetic number, because the mean of its divisors is an integer number (30608882775).

Almost surely, 2^261103154504 is an apocalyptic number.

It is an amenable number.

261103154504 is a deficient number, since it is larger than the sum of its proper divisors (228638969896).

261103154504 is a wasteful number, since it uses less digits than its factorization.

261103154504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11580652 (or 11580648 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 261103154504 its reverse (405451301162), we get a palindrome (666554455666).

The spelling of 261103154504 in words is "two hundred sixty-one billion, one hundred three million, one hundred fifty-four thousand, five hundred four".