25536903534 has 64 divisors (see below), whose sum is σ = 59002332480. Its totient is φ = 8282186496.

The previous prime is 25536903533. The next prime is 25536903541. The reversal of 25536903534 is 43530963552.

It is a happy number.

25536903534 is a `hidden beast` number, since 2 + 5 + 53 + 69 + 0 + 3 + 534 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 25536903534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25536903533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82942 + ... + 240734.

It is an arithmetic number, because the mean of its divisors is an integer number (921911445).

Almost surely, 2^25536903534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25536903534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29501166240).

25536903534 is an abundant number, since it is smaller than the sum of its proper divisors (33465428946).

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

25536903534 is an equidigital number, since it uses as much as digits as its factorization.

25536903534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157853 (or 157835 counting only the distinct ones).

The product of its (nonzero) digits is 1458000, while the sum is 45.

The spelling of 25536903534 in words is "twenty-five billion, five hundred thirty-six million, nine hundred three thousand, five hundred thirty-four".