865021659942 has 16 divisors (see below), whose sum is σ = 1887319985472. Its totient is φ = 262127775720.

The previous prime is 865021659941. The next prime is 865021659949. The reversal of 865021659942 is 249956120568.

865021659942 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865021659941) 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, 6553194328 + ... + 6553194459.

It is an arithmetic number, because the mean of its divisors is an integer number (117957499092).

Almost surely, 2^865021659942 is an apocalyptic number.

865021659942 is an abundant number, since it is smaller than the sum of its proper divisors (1022298325530).

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

865021659942 is a wasteful number, since it uses less digits than its factorization.

865021659942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13106388803.

The product of its (nonzero) digits is 9331200, while the sum is 57.

The spelling of 865021659942 in words is "eight hundred sixty-five billion, twenty-one million, six hundred fifty-nine thousand, nine hundred forty-two".