26378252631 has 12 divisors (see below), whose sum is σ = 38726542920. Its totient is φ = 17297214480.

The previous prime is 26378252557. The next prime is 26378252633. The reversal of 26378252631 is 13625287362.

26378252631 is a `hidden beast` number, since 2 + 6 + 3 + 7 + 8 + 2 + 5 + 2 + 631 = 666.

It is not a de Polignac number, because 26378252631 - 2¹⁵ = 26378219863 is a prime.

It is a super-2 number, since 2×26378252631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26378252633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24023361 + ... + 24024458.

It is an arithmetic number, because the mean of its divisors is an integer number (3227211910).

Almost surely, 2^26378252631 is an apocalyptic number.

26378252631 is a deficient number, since it is larger than the sum of its proper divisors (12348290289).

26378252631 is a wasteful number, since it uses less digits than its factorization.

26378252631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48047886 (or 48047883 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 26378252631 in words is "twenty-six billion, three hundred seventy-eight million, two hundred fifty-two thousand, six hundred thirty-one".