64734745397 has 24 divisors (see below), whose sum is σ = 79304163840. Its totient is φ = 52541939520.

The previous prime is 64734745393. The next prime is 64734745399. The reversal of 64734745397 is 79354743746.

It is not a de Polignac number, because 64734745397 - 2² = 64734745393 is a prime.

It is a super-3 number, since 3×64734745397³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64734745393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2123372 + ... + 2153642.

It is an arithmetic number, because the mean of its divisors is an integer number (3304340160).

Almost surely, 2^64734745397 is an apocalyptic number.

It is an amenable number.

64734745397 is a deficient number, since it is larger than the sum of its proper divisors (14569418443).

64734745397 is a wasteful number, since it uses less digits than its factorization.

64734745397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32601 (or 32594 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 59.

The spelling of 64734745397 in words is "sixty-four billion, seven hundred thirty-four million, seven hundred forty-five thousand, three hundred ninety-seven".