26487220631256 has 512 divisors, whose sum is σ = 94958582169600. Its totient is φ = 6638962176000.

The previous prime is 26487220631251. The next prime is 26487220631303. The reversal of 26487220631256 is 65213602278462.

26487220631256 is a `hidden beast` number, since 2 + 6 + 4 + 8 + 72 + 206 + 312 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26487220631251) 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 127 ways as a sum of consecutive naturals, for example, 181931211 + ... + 182076741.

It is an arithmetic number, because the mean of its divisors is an integer number (185465980800).

Almost surely, 2^{26487220631256} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26487220631256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47479291084800).

26487220631256 is an abundant number, since it is smaller than the sum of its proper divisors (68471361538344).

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

26487220631256 is a wasteful number, since it uses less digits than its factorization.

26487220631256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145948 (or 145938 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 26487220631256 in words is "twenty-six trillion, four hundred eighty-seven billion, two hundred twenty million, six hundred thirty-one thousand, two hundred fifty-six".