25494154480 has 80 divisors (see below), whose sum is σ = 61233580800. Its totient is φ = 9861027840.

The previous prime is 25494154463. The next prime is 25494154507. The reversal of 25494154480 is 8445149452.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 25494154480.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3987126 + ... + 3993514.

It is an arithmetic number, because the mean of its divisors is an integer number (765419760).

Almost surely, 2^25494154480 is an apocalyptic number.

25494154480 is a gapful number since it is divisible by the number (20) 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 25494154480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30616790400).

25494154480 is an abundant number, since it is smaller than the sum of its proper divisors (35739426320).

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

25494154480 is a wasteful number, since it uses less digits than its factorization.

25494154480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8042 (or 8036 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 46.

The spelling of 25494154480 in words is "twenty-five billion, four hundred ninety-four million, one hundred fifty-four thousand, four hundred eighty".