65031618993 has 16 divisors (see below), whose sum is σ = 96003261696. Its totient is φ = 38824845840.

The previous prime is 65031618973. The next prime is 65031618997. The reversal of 65031618993 is 39981613056.

65031618993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65031618993 - 2⁸ = 65031618737 is a prime.

It is a super-2 number, since 2×65031618993² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65031618997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14704171 + ... + 14708592.

It is an arithmetic number, because the mean of its divisors is an integer number (6000203856).

Almost surely, 2^65031618993 is an apocalyptic number.

It is an amenable number.

65031618993 is a deficient number, since it is larger than the sum of its proper divisors (30971642703).

65031618993 is a wasteful number, since it uses less digits than its factorization.

65031618993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29412844.

The product of its (nonzero) digits is 1049760, while the sum is 51.

The spelling of 65031618993 in words is "sixty-five billion, thirty-one million, six hundred eighteen thousand, nine hundred ninety-three".