25723435536 has 30 divisors (see below), whose sum is σ = 71989892910. Its totient is φ = 8574478464.

The previous prime is 25723435523. The next prime is 25723435553. The reversal of 25723435536 is 63553432752.

25723435536 is a `hidden beast` number, since 2 + 5 + 72 + 3 + 43 + 5 + 536 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20608325136 + 5115110400 = 143556^2 + 71520^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25723435491 and 25723435500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89317341 + ... + 89317628.

It is an arithmetic number, because the mean of its divisors is an integer number (2399663097).

Almost surely, 2^25723435536 is an apocalyptic number.

It is an amenable number.

25723435536 is an abundant number, since it is smaller than the sum of its proper divisors (46266457374).

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

25723435536 is a wasteful number, since it uses less digits than its factorization.

25723435536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178634983 (or 178634974 counting only the distinct ones).

The product of its digits is 2268000, while the sum is 45.

The spelling of 25723435536 in words is "twenty-five billion, seven hundred twenty-three million, four hundred thirty-five thousand, five hundred thirty-six".