26390277764 has 12 divisors (see below), whose sum is σ = 46200218064. Its totient is φ = 13190215464.

The previous prime is 26390277731. The next prime is 26390277769. The reversal of 26390277764 is 46777209362.

It is a super-2 number, since 2×26390277764² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26390277769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1218782 + ... + 1240245.

It is an arithmetic number, because the mean of its divisors is an integer number (3850018172).

Almost surely, 2^26390277764 is an apocalyptic number.

It is an amenable number.

26390277764 is a deficient number, since it is larger than the sum of its proper divisors (19809940300).

26390277764 is a wasteful number, since it uses less digits than its factorization.

26390277764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461714 (or 2461712 counting only the distinct ones).

The product of its (nonzero) digits is 5334336, while the sum is 53.

The spelling of 26390277764 in words is "twenty-six billion, three hundred ninety million, two hundred seventy-seven thousand, seven hundred sixty-four".