64994830545 has 32 divisors (see below), whose sum is σ = 111794042880. Its totient is φ = 32140774080.

The previous prime is 64994830543. The next prime is 64994830553. The reversal of 64994830545 is 54503849946.

It is not a de Polignac number, because 64994830545 - 2¹ = 64994830543 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (64994830543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2412691 + ... + 2439480.

It is an arithmetic number, because the mean of its divisors is an integer number (3493563840).

Almost surely, 2^64994830545 is an apocalyptic number.

It is an amenable number.

64994830545 is a deficient number, since it is larger than the sum of its proper divisors (46799212335).

64994830545 is a wasteful number, since it uses less digits than its factorization.

64994830545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4852245.

The product of its (nonzero) digits is 18662400, while the sum is 57.

The spelling of 64994830545 in words is "sixty-four billion, nine hundred ninety-four million, eight hundred thirty thousand, five hundred forty-five".