25428169116 has 72 divisors (see below), whose sum is σ = 73648280160. Its totient is φ = 7246486656.

The previous prime is 25428169061. The next prime is 25428169157. The reversal of 25428169116 is 61196182452.

25428169116 is a `hidden beast` number, since 2 + 542 + 8 + 1 + 6 + 91 + 16 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31671 + ... + 227726.

It is an arithmetic number, because the mean of its divisors is an integer number (1022892780).

Almost surely, 2^25428169116 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 25428169116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36824140080).

25428169116 is an abundant number, since it is smaller than the sum of its proper divisors (48220111044).

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

25428169116 is a wasteful number, since it uses less digits than its factorization.

25428169116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259803 (or 259798 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The spelling of 25428169116 in words is "twenty-five billion, four hundred twenty-eight million, one hundred sixty-nine thousand, one hundred sixteen".