26604222640 has 40 divisors (see below), whose sum is σ = 61887913920. Its totient is φ = 10635995136.

The previous prime is 26604222637. The next prime is 26604222647. The reversal of 26604222640 is 4622240662.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 26604222596 and 26604222605.

It is not an unprimeable number, because it can be changed into a prime (26604222647) 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, 63097 + ... + 239143.

It is an arithmetic number, because the mean of its divisors is an integer number (1547197848).

Almost surely, 2^26604222640 is an apocalyptic number.

26604222640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26604222640 is an abundant number, since it is smaller than the sum of its proper divisors (35283691280).

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

26604222640 is a wasteful number, since it uses less digits than its factorization.

26604222640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177949 (or 177943 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 26604222640 in words is "twenty-six billion, six hundred four million, two hundred twenty-two thousand, six hundred forty".