25712996454 has 128 divisors (see below), whose sum is σ = 58847040000. Its totient is φ = 8320247424.

The previous prime is 25712996447. The next prime is 25712996459. The reversal of 25712996454 is 45469921752.

It is a happy number.

25712996454 is a `hidden beast` number, since 2 + 571 + 2 + 9 + 9 + 64 + 5 + 4 = 666.

It is a super-2 number, since 2×25712996454² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 25712996454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25712996459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 92826564 + ... + 92826840.

It is an arithmetic number, because the mean of its divisors is an integer number (459742500).

Almost surely, 2^25712996454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25712996454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29423520000).

25712996454 is an abundant number, since it is smaller than the sum of its proper divisors (33134043546).

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

25712996454 is a wasteful number, since it uses less digits than its factorization.

25712996454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 653 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The spelling of 25712996454 in words is "twenty-five billion, seven hundred twelve million, nine hundred ninety-six thousand, four hundred fifty-four".