26672184640 has 56 divisors (see below), whose sum is σ = 63537340032. Its totient is φ = 10664808960.

The previous prime is 26672184613. The next prime is 26672184641. The reversal of 26672184640 is 4648127662.

It is a happy number.

It is a super-2 number, since 2×26672184640² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26672184641) 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, 909405 + ... + 938275.

Almost surely, 2^26672184640 is an apocalyptic number.

26672184640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26672184640 is an abundant number, since it is smaller than the sum of its proper divisors (36865155392).

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

26672184640 is a wasteful number, since it uses less digits than its factorization.

26672184640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31775 (or 31765 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 26672184640 in words is "twenty-six billion, six hundred seventy-two million, one hundred eighty-four thousand, six hundred forty".