25426490719 has 16 divisors (see below), whose sum is σ = 29389003776. Its totient is φ = 21547749600.

The previous prime is 25426490717. The next prime is 25426490779. The reversal of 25426490719 is 91709462452.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25426490719 - 2¹ = 25426490717 is a prime.

It is a super-2 number, since 2×25426490719² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25426490711) 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, 197349 + ... + 299665.

It is an arithmetic number, because the mean of its divisors is an integer number (1836812736).

Almost surely, 2^25426490719 is an apocalyptic number.

25426490719 is a deficient number, since it is larger than the sum of its proper divisors (3962513057).

25426490719 is a wasteful number, since it uses less digits than its factorization.

25426490719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102726.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 25426490719 in words is "twenty-five billion, four hundred twenty-six million, four hundred ninety thousand, seven hundred nineteen".