25764021128 has 16 divisors (see below), whose sum is σ = 50850042000. Its totient is φ = 12204009936.

The previous prime is 25764021103. The next prime is 25764021137. The reversal of 25764021128 is 82112046752.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 25764021091 and 25764021100.

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, 84749918 + ... + 84750221.

It is an arithmetic number, because the mean of its divisors is an integer number (3178127625).

Almost surely, 2^25764021128 is an apocalyptic number.

It is an amenable number.

25764021128 is a deficient number, since it is larger than the sum of its proper divisors (25086020872).

25764021128 is a wasteful number, since it uses less digits than its factorization.

25764021128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169500164 (or 169500160 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 25764021128 in words is "twenty-five billion, seven hundred sixty-four million, twenty-one thousand, one hundred twenty-eight".