25391154464 has 96 divisors (see below), whose sum is σ = 54424056960. Its totient is φ = 11591258112.

The previous prime is 25391154461. The next prime is 25391154493. The reversal of 25391154464 is 46445119352.

It is a happy number.

It is a super-3 number, since 3×25391154464³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25391154461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19486037 + ... + 19487339.

It is an arithmetic number, because the mean of its divisors is an integer number (566917260).

Almost surely, 2^25391154464 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 25391154464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27212028480).

25391154464 is an abundant number, since it is smaller than the sum of its proper divisors (29032902496).

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

25391154464 is a wasteful number, since it uses less digits than its factorization.

25391154464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802 (or 1794 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The spelling of 25391154464 in words is "twenty-five billion, three hundred ninety-one million, one hundred fifty-four thousand, four hundred sixty-four".