26401377765264 has 40 divisors (see below), whose sum is σ = 68343607663680. Its totient is φ = 8782388489088.

The previous prime is 26401377765263. The next prime is 26401377765283. The reversal of 26401377765264 is 46256777310462.

It is a junction number, because it is equal to n+sod(n) for n = 26401377765198 and 26401377765207.

It is not an unprimeable number, because it can be changed into a prime (26401377765263) 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, 564687819 + ... + 564734570.

It is an arithmetic number, because the mean of its divisors is an integer number (1708590191592).

Almost surely, 2^{26401377765264} is an apocalyptic number.

26401377765264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

26401377765264 is an abundant number, since it is smaller than the sum of its proper divisors (41942229898416).

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

26401377765264 is a wasteful number, since it uses less digits than its factorization.

26401377765264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129422887 (or 1129422881 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 60.

The spelling of 26401377765264 in words is "twenty-six trillion, four hundred one billion, three hundred seventy-seven million, seven hundred sixty-five thousand, two hundred sixty-four".