26651121631 has 8 divisors (see below), whose sum is σ = 27513327744. Its totient is φ = 25789071360.

The previous prime is 26651121599. The next prime is 26651121641. The reversal of 26651121631 is 13612115662.

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 26651121631 - 2⁵ = 26651121599 is a prime.

It is a super-2 number, since 2×26651121631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26651121641) 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, 380415 + ... + 444991.

It is an arithmetic number, because the mean of its divisors is an integer number (3439165968).

Almost surely, 2^26651121631 is an apocalyptic number.

26651121631 is a deficient number, since it is larger than the sum of its proper divisors (862206113).

26651121631 is a wasteful number, since it uses less digits than its factorization.

26651121631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77921.

The product of its digits is 12960, while the sum is 34.

The spelling of 26651121631 in words is "twenty-six billion, six hundred fifty-one million, one hundred twenty-one thousand, six hundred thirty-one".