25628929949 has 16 divisors (see below), whose sum is σ = 29532518400. Its totient is φ = 21786259824.

The previous prime is 25628929939. The next prime is 25628929957. The reversal of 25628929949 is 94992982652.

It is not a de Polignac number, because 25628929949 - 2⁴ = 25628929933 is a prime.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25628929939) 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, 927272 + ... + 954510.

It is an arithmetic number, because the mean of its divisors is an integer number (1845782400).

Almost surely, 2^25628929949 is an apocalyptic number.

It is an amenable number.

25628929949 is a deficient number, since it is larger than the sum of its proper divisors (3903588451).

25628929949 is a wasteful number, since it uses less digits than its factorization.

25628929949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28352.

The product of its digits is 50388480, while the sum is 65.

The spelling of 25628929949 in words is "twenty-five billion, six hundred twenty-eight million, nine hundred twenty-nine thousand, nine hundred forty-nine".