25701457789 has 4 divisors (see below), whose sum is σ = 29373094624. Its totient is φ = 22029820956.

The previous prime is 25701457783. The next prime is 25701457799. The reversal of 25701457789 is 98775410752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25701457789 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 (25701457783) 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, 1835818407 + ... + 1835818420.

It is an arithmetic number, because the mean of its divisors is an integer number (7343273656).

Almost surely, 2^25701457789 is an apocalyptic number.

It is an amenable number.

25701457789 is a deficient number, since it is larger than the sum of its proper divisors (3671636835).

25701457789 is an equidigital number, since it uses as much as digits as its factorization.

25701457789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3671636834.

The product of its (nonzero) digits is 4939200, while the sum is 55.

The spelling of 25701457789 in words is "twenty-five billion, seven hundred one million, four hundred fifty-seven thousand, seven hundred eighty-nine".