26610661457 has 8 divisors (see below), whose sum is σ = 27300199584. Its totient is φ = 25929907488.

The previous prime is 26610661421. The next prime is 26610661477. The reversal of 26610661457 is 75416601662.

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

It is a cyclic number.

It is not a de Polignac number, because 26610661457 - 2²⁰ = 26609612881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26610661477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2189903 + ... + 2202020.

It is an arithmetic number, because the mean of its divisors is an integer number (3412524948).

Almost surely, 2^26610661457 is an apocalyptic number.

It is an amenable number.

26610661457 is a deficient number, since it is larger than the sum of its proper divisors (689538127).

26610661457 is an equidigital number, since it uses as much as digits as its factorization.

26610661457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4392079.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 26610661457 in words is "twenty-six billion, six hundred ten million, six hundred sixty-one thousand, four hundred fifty-seven".