26610661456 has 40 divisors (see below), whose sum is σ = 53752675680. Its totient is φ = 12750681216.

The previous prime is 26610661421. The next prime is 26610661477. The reversal of 26610661456 is 65416601662.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328426 + ... + 401353.

It is an arithmetic number, because the mean of its divisors is an integer number (1343816892).

Almost surely, 2^26610661456 is an apocalyptic number.

It is an amenable number.

26610661456 is an abundant number, since it is smaller than the sum of its proper divisors (27142014224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26610661456 is a wasteful number, since it uses less digits than its factorization.

26610661456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729883 (or 729877 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 26610661456 in words is "twenty-six billion, six hundred ten million, six hundred sixty-one thousand, four hundred fifty-six".