25105506468 has 48 divisors (see below), whose sum is σ = 67397366400. Its totient is φ = 7124857344.

The previous prime is 25105506427. The next prime is 25105506469. The reversal of 25105506468 is 86460550152.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (25105506469) 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, 990421 + ... + 1015452.

It is an arithmetic number, because the mean of its divisors is an integer number (1404111800).

Almost surely, 2^25105506468 is an apocalyptic number.

25105506468 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25105506468 is an abundant number, since it is smaller than the sum of its proper divisors (42291859932).

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

25105506468 is a wasteful number, since it uses less digits than its factorization.

25105506468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006036 (or 2006034 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 25105506468 in words is "twenty-five billion, one hundred five million, five hundred six thousand, four hundred sixty-eight".