25283450979 has 12 divisors (see below), whose sum is σ = 36620056096. Its totient is φ = 16809703632.

The previous prime is 25283450947. The next prime is 25283450987. The reversal of 25283450979 is 97905438252.

25283450979 is a `hidden beast` number, since 2 + 52 + 83 + 4 + 509 + 7 + 9 = 666.

It is not a de Polignac number, because 25283450979 - 2⁵ = 25283450947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25283450909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3824044 + ... + 3830649.

Almost surely, 2^25283450979 is an apocalyptic number.

25283450979 is a deficient number, since it is larger than the sum of its proper divisors (11336605117).

25283450979 is a wasteful number, since it uses less digits than its factorization.

25283450979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7655066 (or 7655063 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 25283450979 in words is "twenty-five billion, two hundred eighty-three million, four hundred fifty thousand, nine hundred seventy-nine".