65121938530 has 64 divisors (see below), whose sum is σ = 130263292800. Its totient is φ = 23239941120.

The previous prime is 65121938521. The next prime is 65121938561. The reversal of 65121938530 is 3583912156.

65121938530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 3970186 + ... + 3986554.

It is an arithmetic number, because the mean of its divisors is an integer number (2035363950).

Almost surely, 2^65121938530 is an apocalyptic number.

65121938530 is an abundant number, since it is smaller than the sum of its proper divisors (65141354270).

65121938530 is a wasteful number, since it uses less digits than its factorization.

65121938530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17059.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 65121938530 in words is "sixty-five billion, one hundred twenty-one million, nine hundred thirty-eight thousand, five hundred thirty".