25428500488 has 8 divisors (see below), whose sum is σ = 47678438430. Its totient is φ = 12714250240.

The previous prime is 25428500477. The next prime is 25428500491. The reversal of 25428500488 is 88400582452.

It can be written as a sum of positive squares in only one way, i.e., 25294357764 + 134142724 = 159042^2 + 11582^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1589281273 + ... + 1589281288.

Almost surely, 2^25428500488 is an apocalyptic number.

It is an amenable number.

25428500488 is a deficient number, since it is larger than the sum of its proper divisors (22249937942).

25428500488 is a wasteful number, since it uses less digits than its factorization.

25428500488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3178562567 (or 3178562563 counting only the distinct ones).

The product of its (nonzero) digits is 819200, while the sum is 46.

The spelling of 25428500488 in words is "twenty-five billion, four hundred twenty-eight million, five hundred thousand, four hundred eighty-eight".