25719138672 has 160 divisors (see below), whose sum is σ = 70115012352. Its totient is φ = 8113416192.

The previous prime is 25719138671. The next prime is 25719138707. The reversal of 25719138672 is 27683191752.

It is a super-2 number, since 2×25719138672² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25719138671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23444428 + ... + 23445524.

Almost surely, 2^25719138672 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 25719138672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35057506176).

25719138672 is an abundant number, since it is smaller than the sum of its proper divisors (44395873680).

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

25719138672 is a wasteful number, since it uses less digits than its factorization.

25719138672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495 (or 1489 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The spelling of 25719138672 in words is "twenty-five billion, seven hundred nineteen million, one hundred thirty-eight thousand, six hundred seventy-two".