8255742687 has 24 divisors (see below), whose sum is σ = 12583998960. Its totient is φ = 5201107200.

The previous prime is 8255742683. The next prime is 8255742689. The reversal of 8255742687 is 7862475528.

8255742687 is a `hidden beast` number, since 8 + 2 + 5 + 574 + 2 + 68 + 7 = 666.

It is not a de Polignac number, because 8255742687 - 2² = 8255742683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8255742683) 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, 8373 + ... + 128769.

It is an arithmetic number, because the mean of its divisors is an integer number (524333290).

Almost surely, 2^8255742687 is an apocalyptic number.

8255742687 is a deficient number, since it is larger than the sum of its proper divisors (4328256273).

8255742687 is a wasteful number, since it uses less digits than its factorization.

8255742687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120823 (or 120820 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 54.

The square root of 8255742687 is about 90861.1175751212. The cubic root of 8255742687 is about 2021.0887414992.

The spelling of 8255742687 in words is "eight billion, two hundred fifty-five million, seven hundred forty-two thousand, six hundred eighty-seven".