25229779746 has 16 divisors (see below), whose sum is σ = 50564908800. Its totient is φ = 8392368368.

The previous prime is 25229779739. The next prime is 25229779763. The reversal of 25229779746 is 64797792252.

It is a self number, because there is not a number n which added to its sum of digits gives 25229779746.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4386441 + ... + 4392188.

It is an arithmetic number, because the mean of its divisors is an integer number (3160306800).

Almost surely, 2^25229779746 is an apocalyptic number.

25229779746 is an abundant number, since it is smaller than the sum of its proper divisors (25335129054).

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

25229779746 is a wasteful number, since it uses less digits than its factorization.

25229779746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8779113.

The product of its digits is 26671680, while the sum is 60.

The spelling of 25229779746 in words is "twenty-five billion, two hundred twenty-nine million, seven hundred seventy-nine thousand, seven hundred forty-six".