26400073638 has 32 divisors (see below), whose sum is σ = 52955527680. Its totient is φ = 8774156160.

The previous prime is 26400073627. The next prime is 26400073639. The reversal of 26400073638 is 83637000462.

It is a junction number, because it is equal to n+sod(n) for n = 26400073596 and 26400073605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26400073639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6085006 + ... + 6089342.

It is an arithmetic number, because the mean of its divisors is an integer number (1654860240).

Almost surely, 2^26400073638 is an apocalyptic number.

26400073638 is an abundant number, since it is smaller than the sum of its proper divisors (26555454042).

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

26400073638 is a wasteful number, since it uses less digits than its factorization.

26400073638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7092.

The product of its (nonzero) digits is 145152, while the sum is 39.

The spelling of 26400073638 in words is "twenty-six billion, four hundred million, seventy-three thousand, six hundred thirty-eight".