65616515650 has 48 divisors (see below), whose sum is σ = 140836235904. Its totient is φ = 22278660480.

The previous prime is 65616515633. The next prime is 65616515677. The reversal of 65616515650 is 5651561656.

It is a self number, because there is not a number n which added to its sum of digits gives 65616515650.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 874027 + ... + 946126.

It is an arithmetic number, because the mean of its divisors is an integer number (2934088248).

Almost surely, 2^65616515650 is an apocalyptic number.

65616515650 is an abundant number, since it is smaller than the sum of its proper divisors (75219720254).

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

65616515650 is a wasteful number, since it uses less digits than its factorization.

65616515650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820275 (or 1820270 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 65616515650 in words is "sixty-five billion, six hundred sixteen million, five hundred fifteen thousand, six hundred fifty".