64720353 has 8 divisors (see below), whose sum is σ = 86337216. Its totient is φ = 43125200.

The previous prime is 64720339. The next prime is 64720361. The reversal of 64720353 is 35302746.

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 64720353 - 2¹³ = 64712161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64720353.

It is not an unprimeable number, because it can be changed into a prime (64720303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3748 + ... + 11978.

It is an arithmetic number, because the mean of its divisors is an integer number (10792152).

Almost surely, 2^64720353 is an apocalyptic number.

It is an amenable number.

64720353 is a deficient number, since it is larger than the sum of its proper divisors (21616863).

64720353 is a wasteful number, since it uses less digits than its factorization.

64720353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10855.

The product of its (nonzero) digits is 15120, while the sum is 30.

The square root of 64720353 is about 8044.8960838534. The cubic root of 64720353 is about 401.4951398456.

The spelling of 64720353 in words is "sixty-four million, seven hundred twenty thousand, three hundred fifty-three".