25742642715 has 24 divisors (see below), whose sum is σ = 46159223760. Its totient is φ = 13255980864.

The previous prime is 25742642711. The next prime is 25742642771. The reversal of 25742642715 is 51724624752.

25742642715 is a `hidden beast` number, since 2 + 574 + 2 + 6 + 4 + 2 + 71 + 5 = 666.

It is not a de Polignac number, because 25742642715 - 2² = 25742642711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (25742642711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9861777 + ... + 9864386.

It is an arithmetic number, because the mean of its divisors is an integer number (1923300990).

Almost surely, 2^25742642715 is an apocalyptic number.

25742642715 is a deficient number, since it is larger than the sum of its proper divisors (20416581045).

25742642715 is a wasteful number, since it uses less digits than its factorization.

25742642715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19726203 (or 19726200 counting only the distinct ones).

The product of its digits is 940800, while the sum is 45.

The spelling of 25742642715 in words is "twenty-five billion, seven hundred forty-two million, six hundred forty-two thousand, seven hundred fifteen".