26215272440 has 48 divisors (see below), whose sum is σ = 68614468200. Its totient is φ = 8988092736.

The previous prime is 26215272427. The next prime is 26215272443. The reversal of 26215272440 is 4427251262.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 26215272440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26215272443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6685610 + ... + 6689529.

Almost surely, 2^26215272440 is an apocalyptic number.

26215272440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26215272440 is an abundant number, since it is smaller than the sum of its proper divisors (42399195760).

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

26215272440 is a wasteful number, since it uses less digits than its factorization.

26215272440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13375164 (or 13375153 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 35.

The spelling of 26215272440 in words is "twenty-six billion, two hundred fifteen million, two hundred seventy-two thousand, four hundred forty".