25134977802 has 64 divisors (see below), whose sum is σ = 58128150528. Its totient is φ = 7160928000.

The previous prime is 25134977789. The next prime is 25134977827. The reversal of 25134977802 is 20877943152.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1077927 + ... + 1100997.

It is an arithmetic number, because the mean of its divisors is an integer number (908252352).

Almost surely, 2^25134977802 is an apocalyptic number.

25134977802 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 25134977802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29064075264).

25134977802 is an abundant number, since it is smaller than the sum of its proper divisors (32993172726).

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

25134977802 is a wasteful number, since it uses less digits than its factorization.

25134977802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24075.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 25134977802 in words is "twenty-five billion, one hundred thirty-four million, nine hundred seventy-seven thousand, eight hundred two".