25764720449 has 16 divisors (see below), whose sum is σ = 28184486400. Its totient is φ = 23409910656.

The previous prime is 25764720433. The next prime is 25764720479. The reversal of 25764720449 is 94402746752.

It is not a de Polignac number, because 25764720449 - 2⁴ = 25764720433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25764720397 and 25764720406.

It is not an unprimeable number, because it can be changed into a prime (25764720479) 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, 208082 + ... + 307940.

It is an arithmetic number, because the mean of its divisors is an integer number (1761530400).

Almost surely, 2^25764720449 is an apocalyptic number.

It is an amenable number.

25764720449 is a deficient number, since it is larger than the sum of its proper divisors (2419765951).

25764720449 is a wasteful number, since it uses less digits than its factorization.

25764720449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100184.

The product of its (nonzero) digits is 3386880, while the sum is 50.

The spelling of 25764720449 in words is "twenty-five billion, seven hundred sixty-four million, seven hundred twenty thousand, four hundred forty-nine".