25355212791 has 8 divisors (see below), whose sum is σ = 33823345920. Its totient is φ = 16895277432.

The previous prime is 25355212789. The next prime is 25355212801. The reversal of 25355212791 is 19721255352.

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

It is not a de Polignac number, because 25355212791 - 2¹ = 25355212789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25355212711) 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, 2042221 + ... + 2054598.

It is an arithmetic number, because the mean of its divisors is an integer number (4227918240).

Almost surely, 2^25355212791 is an apocalyptic number.

25355212791 is a deficient number, since it is larger than the sum of its proper divisors (8468133129).

25355212791 is a wasteful number, since it uses less digits than its factorization.

25355212791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098885.

The product of its digits is 189000, while the sum is 42.

The spelling of 25355212791 in words is "twenty-five billion, three hundred fifty-five million, two hundred twelve thousand, seven hundred ninety-one".