25949513287 has 8 divisors (see below), whose sum is σ = 26852842800. Its totient is φ = 25046751744.

The previous prime is 25949513267. The next prime is 25949513297. The reversal of 25949513287 is 78231594952.

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 25949513287 - 2¹¹ = 25949511239 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 (25949513267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47962 + ... + 232807.

It is an arithmetic number, because the mean of its divisors is an integer number (3356605350).

Almost surely, 2^25949513287 is an apocalyptic number.

25949513287 is a deficient number, since it is larger than the sum of its proper divisors (903329513).

25949513287 is a wasteful number, since it uses less digits than its factorization.

25949513287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283985.

The product of its digits is 5443200, while the sum is 55.

The spelling of 25949513287 in words is "twenty-five billion, nine hundred forty-nine million, five hundred thirteen thousand, two hundred eighty-seven".