26257769240 has 16 divisors (see below), whose sum is σ = 59079980880. Its totient is φ = 10503107680.

The previous prime is 26257769231. The next prime is 26257769273. The reversal of 26257769240 is 4296775262.

It is a super-2 number, since 2×26257769240² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328222076 + ... + 328222155.

It is an arithmetic number, because the mean of its divisors is an integer number (3692498805).

Almost surely, 2^26257769240 is an apocalyptic number.

26257769240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26257769240 is an abundant number, since it is smaller than the sum of its proper divisors (32822211640).

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

26257769240 is a wasteful number, since it uses less digits than its factorization.

26257769240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656444242 (or 656444238 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 26257769240 in words is "twenty-six billion, two hundred fifty-seven million, seven hundred sixty-nine thousand, two hundred forty".