25138493784943 has 96 divisors (see below), whose sum is σ = 33335342401536. Its totient is φ = 18880646400000.

The previous prime is 25138493784923. The next prime is 25138493785003. The reversal of 25138493784943 is 34948739483152.

It is a de Polignac number, because none of the positive numbers 2^k-25138493784943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25138493784923) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 507444271 + ... + 507493807.

It is an arithmetic number, because the mean of its divisors is an integer number (347243150016).

Almost surely, 2^{25138493784943} is an apocalyptic number.

25138493784943 is a deficient number, since it is larger than the sum of its proper divisors (8196848616593).

25138493784943 is a wasteful number, since it uses less digits than its factorization.

25138493784943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49866 (or 49837 counting only the distinct ones).

The product of its digits is 627056640, while the sum is 70.

The spelling of 25138493784943 in words is "twenty-five trillion, one hundred thirty-eight billion, four hundred ninety-three million, seven hundred eighty-four thousand, nine hundred forty-three".