25397999983 has 8 divisors (see below), whose sum is σ = 26893410048. Its totient is φ = 23902746624.

The previous prime is 25397999971. The next prime is 25397999993. The reversal of 25397999983 is 38999979352.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25397999983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25397999953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535410 + ... + 580912.

It is an arithmetic number, because the mean of its divisors is an integer number (3361676256).

Almost surely, 2^25397999983 is an apocalyptic number.

25397999983 is a deficient number, since it is larger than the sum of its proper divisors (1495410065).

25397999983 is a wasteful number, since it uses less digits than its factorization.

25397999983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78353.

The product of its digits is 297606960, while the sum is 73.

The spelling of 25397999983 in words is "twenty-five billion, three hundred ninety-seven million, nine hundred ninety-nine thousand, nine hundred eighty-three".