25028809416 has 144 divisors (see below), whose sum is σ = 73542502800. Its totient is φ = 7686417024.

The previous prime is 25028809409. The next prime is 25028809423. The reversal of 25028809416 is 61490882052.

It is an interprime number because it is at equal distance from previous prime (25028809409) and next prime (25028809423).

It is a super-2 number, since 2×25028809416² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7530331 + ... + 7533653.

It is an arithmetic number, because the mean of its divisors is an integer number (510711825).

Almost surely, 2^25028809416 is an apocalyptic number.

25028809416 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25028809416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36771251400).

25028809416 is an abundant number, since it is smaller than the sum of its proper divisors (48513693384).

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

25028809416 is a wasteful number, since it uses less digits than its factorization.

25028809416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980 (or 3960 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 25028809416 in words is "twenty-five billion, twenty-eight million, eight hundred nine thousand, four hundred sixteen".