65861849690 has 64 divisors (see below), whose sum is σ = 146875921920. Its totient is φ = 20706105600.

The previous prime is 65861849671. The next prime is 65861849737. The reversal of 65861849690 is 9694816856.

It is a happy number.

65861849690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×65861849690² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102245 + ... + 377064.

It is an arithmetic number, because the mean of its divisors is an integer number (2294936280).

Almost surely, 2^65861849690 is an apocalyptic number.

65861849690 is an abundant number, since it is smaller than the sum of its proper divisors (81014072230).

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

65861849690 is a wasteful number, since it uses less digits than its factorization.

65861849690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479487.

The product of its (nonzero) digits is 22394880, while the sum is 62.

The spelling of 65861849690 in words is "sixty-five billion, eight hundred sixty-one million, eight hundred forty-nine thousand, six hundred ninety".