25654621983 has 16 divisors (see below), whose sum is σ = 34749807456. Its totient is φ = 16833208320.

The previous prime is 25654621969. The next prime is 25654621991. The reversal of 25654621983 is 38912645652.

It is a happy number.

It is not a de Polignac number, because 25654621983 - 2¹⁸ = 25654359839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25654621943) 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, 190866 + ... + 296207.

It is an arithmetic number, because the mean of its divisors is an integer number (2171862966).

Almost surely, 2^25654621983 is an apocalyptic number.

25654621983 is a deficient number, since it is larger than the sum of its proper divisors (9095185473).

25654621983 is a wasteful number, since it uses less digits than its factorization.

25654621983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487354.

The product of its digits is 3110400, while the sum is 51.

The spelling of 25654621983 in words is "twenty-five billion, six hundred fifty-four million, six hundred twenty-one thousand, nine hundred eighty-three".