25720884149 has 8 divisors (see below), whose sum is σ = 25762575000. Its totient is φ = 25679227392.

The previous prime is 25720884143. The next prime is 25720884173. The reversal of 25720884149 is 94148802752.

It can be written as a sum of positive squares in 4 ways, for example, as 10398900625 + 15321983524 = 101975^2 + 123782^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25720884149 - 2²⁴ = 25704106933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25720884097 and 25720884106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25720884143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1797977 + ... + 1812225.

It is an arithmetic number, because the mean of its divisors is an integer number (3220321875).

Almost surely, 2^25720884149 is an apocalyptic number.

It is an amenable number.

25720884149 is a deficient number, since it is larger than the sum of its proper divisors (41690851).

25720884149 is a wasteful number, since it uses less digits than its factorization.

25720884149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17047.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 25720884149 in words is "twenty-five billion, seven hundred twenty million, eight hundred eighty-four thousand, one hundred forty-nine".