25407642993 has 8 divisors (see below), whose sum is σ = 33881088000. Its totient is φ = 16936313328.

The previous prime is 25407642991. The next prime is 25407643007. The reversal of 25407642993 is 39924670452.

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

It is not a de Polignac number, because 25407642993 - 2¹ = 25407642991 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25407642991) 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, 500593 + ... + 549006.

It is an arithmetic number, because the mean of its divisors is an integer number (4235136000).

Almost surely, 2^25407642993 is an apocalyptic number.

It is an amenable number.

25407642993 is a deficient number, since it is larger than the sum of its proper divisors (8473445007).

25407642993 is a wasteful number, since it uses less digits than its factorization.

25407642993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057671.

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 25407642993 in words is "twenty-five billion, four hundred seven million, six hundred forty-two thousand, nine hundred ninety-three".