26157355312440 has 128 divisors (see below), whose sum is σ = 88367370577920. Its totient is φ = 6136622937600.

The previous prime is 26157355312411. The next prime is 26157355312441. The reversal of 26157355312440 is 4421355375162.

It is a self number, because there is not a number n which added to its sum of digits gives 26157355312440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26157355312441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 319574859 + ... + 319656698.

It is an arithmetic number, because the mean of its divisors is an integer number (690370082640).

Almost surely, 2^{26157355312440} is an apocalyptic number.

26157355312440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26157355312440 is an abundant number, since it is smaller than the sum of its proper divisors (62210015265480).

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

26157355312440 is a wasteful number, since it uses less digits than its factorization.

26157355312440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639231613 (or 639231609 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 26157355312440 in words is "twenty-six trillion, one hundred fifty-seven billion, three hundred fifty-five million, three hundred twelve thousand, four hundred forty".