64506036393 has 64 divisors (see below), whose sum is σ = 109390752000. Its totient is φ = 37307630592.

The previous prime is 64506036341. The next prime is 64506036403. The reversal of 64506036393 is 39363060546.

64506036393 is a `hidden beast` number, since 6 + 4 + 5 + 0 + 6 + 0 + 3 + 639 + 3 = 666.

It is not a de Polignac number, because 64506036393 - 2²⁰ = 64504987817 is a prime.

It is a super-2 number, since 2×64506036393² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64506036293) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 222723 + ... + 422631.

It is an arithmetic number, because the mean of its divisors is an integer number (1709230500).

Almost surely, 2^64506036393 is an apocalyptic number.

It is an amenable number.

64506036393 is a deficient number, since it is larger than the sum of its proper divisors (44884715607).

64506036393 is a wasteful number, since it uses less digits than its factorization.

64506036393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199991 (or 199985 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 45.

The spelling of 64506036393 in words is "sixty-four billion, five hundred six million, thirty-six thousand, three hundred ninety-three".