25236511536 has 80 divisors (see below), whose sum is σ = 68664962304. Its totient is φ = 7971186432.

The previous prime is 25236511507. The next prime is 25236511541. The reversal of 25236511536 is 63511563252.

It is a super-2 number, since 2×25236511536² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25236511494 and 25236511503.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11310 + ... + 224946.

Almost surely, 2^25236511536 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 25236511536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34332481152).

25236511536 is an abundant number, since it is smaller than the sum of its proper divisors (43428450768).

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

25236511536 is a wasteful number, since it uses less digits than its factorization.

25236511536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213778 (or 213772 counting only the distinct ones).

The product of its digits is 162000, while the sum is 39.

It can be divided in two parts, 252365 and 11536, that added together give a triangular number (263901 = T₇₂₆).

The spelling of 25236511536 in words is "twenty-five billion, two hundred thirty-six million, five hundred eleven thousand, five hundred thirty-six".