26323769640 has 128 divisors (see below), whose sum is σ = 95003136000. Its totient is φ = 5700181248.

The previous prime is 26323769639. The next prime is 26323769653. The reversal of 26323769640 is 4696732362.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 26323769640.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 808720 + ... + 840639.

It is an arithmetic number, because the mean of its divisors is an integer number (742212000).

Almost surely, 2^26323769640 is an apocalyptic number.

26323769640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26323769640 is an abundant number, since it is smaller than the sum of its proper divisors (68679366360).

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

26323769640 is a wasteful number, since it uses less digits than its factorization.

26323769640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649399 (or 1649395 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 48.

The spelling of 26323769640 in words is "twenty-six billion, three hundred twenty-three million, seven hundred sixty-nine thousand, six hundred forty".