26221602440 has 64 divisors (see below), whose sum is σ = 64952712000. Its totient is φ = 9447632640.

The previous prime is 26221602431. The next prime is 26221602493. The reversal of 26221602440 is 4420612262.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225410 + ... + 321329.

It is an arithmetic number, because the mean of its divisors is an integer number (1014886125).

Almost surely, 2^26221602440 is an apocalyptic number.

26221602440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26221602440 is an abundant number, since it is smaller than the sum of its proper divisors (38731109560).

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

26221602440 is a wasteful number, since it uses less digits than its factorization.

26221602440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546870 (or 546866 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The spelling of 26221602440 in words is "twenty-six billion, two hundred twenty-one million, six hundred two thousand, four hundred forty".