25278052999 has 4 divisors (see below), whose sum is σ = 25439059864. Its totient is φ = 25117046136.

The previous prime is 25278052997. The next prime is 25278053033. The reversal of 25278052999 is 99925087252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25278052999 - 2¹ = 25278052997 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 (25278052997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80503197 + ... + 80503510.

It is an arithmetic number, because the mean of its divisors is an integer number (6359764966).

Almost surely, 2^25278052999 is an apocalyptic number.

25278052999 is a deficient number, since it is larger than the sum of its proper divisors (161006865).

25278052999 is a wasteful number, since it uses less digits than its factorization.

25278052999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161006864.

The product of its (nonzero) digits is 8164800, while the sum is 58.

The spelling of 25278052999 in words is "twenty-five billion, two hundred seventy-eight million, fifty-two thousand, nine hundred ninety-nine".