25239144997 has 8 divisors (see below), whose sum is σ = 27578100960. Its totient is φ = 22907603760.

The previous prime is 25239144989. The next prime is 25239145027. The reversal of 25239144997 is 79944193252.

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 not a de Polignac number, because 25239144997 - 2³ = 25239144989 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 (25239144797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1846558 + ... + 1860175.

It is an arithmetic number, because the mean of its divisors is an integer number (3447262620).

Almost surely, 2^25239144997 is an apocalyptic number.

It is an amenable number.

25239144997 is a deficient number, since it is larger than the sum of its proper divisors (2338955963).

25239144997 is a wasteful number, since it uses less digits than its factorization.

25239144997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707363.

The product of its digits is 4898880, while the sum is 55.

It can be divided in two parts, 25239 and 144997, that added together give a triangular number (170236 = T₅₈₃).

The spelling of 25239144997 in words is "twenty-five billion, two hundred thirty-nine million, one hundred forty-four thousand, nine hundred ninety-seven".