8561345742 has 12 divisors (see below), whose sum is σ = 18549582480. Its totient is φ = 2853781908.

The previous prime is 8561345731. The next prime is 8561345743. The reversal of 8561345742 is 2475431658.

8561345742 is a `hidden beast` number, since 8 + 561 + 3 + 45 + 7 + 42 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8561345743) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 237815142 + ... + 237815177.

It is an arithmetic number, because the mean of its divisors is an integer number (1545798540).

Almost surely, 2^8561345742 is an apocalyptic number.

8561345742 is an abundant number, since it is smaller than the sum of its proper divisors (9988236738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8561345742 is a wasteful number, since it uses less digits than its factorization.

8561345742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475630327 (or 475630324 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 8561345742 is about 92527.5404514786. The cubic root of 8561345742 is about 2045.7254370805.

The spelling of 8561345742 in words is "eight billion, five hundred sixty-one million, three hundred forty-five thousand, seven hundred forty-two".