25902378036 has 18 divisors (see below), whose sum is σ = 65475455682. Its totient is φ = 8634126000.

The previous prime is 25902378023. The next prime is 25902378077. The reversal of 25902378036 is 63087320952.

25902378036 is a `hidden beast` number, since 2 + 590 + 23 + 7 + 8 + 0 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23034132900 + 2868245136 = 151770^2 + 53556^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 25902377982 and 25902378000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 359755215 + ... + 359755286.

Almost surely, 2^25902378036 is an apocalyptic number.

It is an amenable number.

25902378036 is an abundant number, since it is smaller than the sum of its proper divisors (39573077646).

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

25902378036 is a wasteful number, since it uses less digits than its factorization.

25902378036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719510511 (or 719510506 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

Adding to 25902378036 its reverse (63087320952), we get a palindrome (88989698988).

The spelling of 25902378036 in words is "twenty-five billion, nine hundred two million, three hundred seventy-eight thousand, thirty-six".