64636740373 has 8 divisors (see below), whose sum is σ = 67223982080. Its totient is φ = 62093725200.

The previous prime is 64636740361. The next prime is 64636740391. The reversal of 64636740373 is 37304763646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64636740373 - 2²⁹ = 64099869461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64636740353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11053653 + ... + 11059498.

It is an arithmetic number, because the mean of its divisors is an integer number (8402997760).

Almost surely, 2^64636740373 is an apocalyptic number.

It is an amenable number.

64636740373 is a deficient number, since it is larger than the sum of its proper divisors (2587241707).

64636740373 is a wasteful number, since it uses less digits than its factorization.

64636740373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22113267.

The product of its (nonzero) digits is 4572288, while the sum is 49.

The spelling of 64636740373 in words is "sixty-four billion, six hundred thirty-six million, seven hundred forty thousand, three hundred seventy-three".