25917965454 has 16 divisors (see below), whose sum is σ = 51841797840. Its totient is φ = 8638344000.

The previous prime is 25917965453. The next prime is 25917965467. The reversal of 25917965454 is 45456971952.

It is a super-2 number, since 2×25917965454² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25917965394 and 25917965403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25917965453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185949 + ... + 293960.

It is an arithmetic number, because the mean of its divisors is an integer number (3240112365).

Almost surely, 2^25917965454 is an apocalyptic number.

25917965454 is an abundant number, since it is smaller than the sum of its proper divisors (25923832386).

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

25917965454 is a wasteful number, since it uses less digits than its factorization.

25917965454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488915.

The product of its digits is 13608000, while the sum is 57.

The spelling of 25917965454 in words is "twenty-five billion, nine hundred seventeen million, nine hundred sixty-five thousand, four hundred fifty-four".