25638540000787 has 48 divisors (see below), whose sum is σ = 32485368176640. Its totient is φ = 19780341115392.

The previous prime is 25638540000767. The next prime is 25638540000797. The reversal of 25638540000787 is 78700004583652.

It is not a de Polignac number, because 25638540000787 - 2¹⁹ = 25638539476499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25638540000767) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 273031758 + ... + 273125644.

It is an arithmetic number, because the mean of its divisors is an integer number (676778503680).

Almost surely, 2^{25638540000787} is an apocalyptic number.

25638540000787 is a deficient number, since it is larger than the sum of its proper divisors (6846828175853).

25638540000787 is a wasteful number, since it uses less digits than its factorization.

25638540000787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99820 (or 99803 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 55.

The spelling of 25638540000787 in words is "twenty-five trillion, six hundred thirty-eight billion, five hundred forty million, seven hundred eighty-seven", and thus it is an aban number.