25712155458 has 80 divisors (see below), whose sum is σ = 62890603776. Its totient is φ = 7786769760.

The previous prime is 25712155453. The next prime is 25712155471. The reversal of 25712155458 is 85455121752.

It is a happy number.

25712155458 is a `hidden beast` number, since 2 + 5 + 71 + 21 + 554 + 5 + 8 = 666.

It is a super-2 number, since 2×25712155458² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (25712155453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3815460 + ... + 3822192.

Almost surely, 2^25712155458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25712155458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31445301888).

25712155458 is an abundant number, since it is smaller than the sum of its proper divisors (37178448318).

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

25712155458 is a wasteful number, since it uses less digits than its factorization.

25712155458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8901 (or 8892 counting only the distinct ones).

The product of its digits is 560000, while the sum is 45.

The spelling of 25712155458 in words is "twenty-five billion, seven hundred twelve million, one hundred fifty-five thousand, four hundred fifty-eight".