25623439501 has 16 divisors (see below), whose sum is σ = 30703357440. Its totient is φ = 21108550320.

The previous prime is 25623439493. The next prime is 25623439511. The reversal of 25623439501 is 10593432652.

It is not a de Polignac number, because 25623439501 - 2³ = 25623439493 is a prime.

It is a super-2 number, since 2×25623439501² (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 (25623439511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2660415 + ... + 2670028.

It is an arithmetic number, because the mean of its divisors is an integer number (1918959840).

Almost surely, 2^25623439501 is an apocalyptic number.

It is an amenable number.

25623439501 is a deficient number, since it is larger than the sum of its proper divisors (5079917939).

25623439501 is a wasteful number, since it uses less digits than its factorization.

25623439501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5330496.

The product of its (nonzero) digits is 194400, while the sum is 40.

It can be divided in two parts, 25623 and 439501, that added together give a square (465124 = 682²).

The spelling of 25623439501 in words is "twenty-five billion, six hundred twenty-three million, four hundred thirty-nine thousand, five hundred one".