64730615 has 4 divisors (see below), whose sum is σ = 77676744. Its totient is φ = 51784488.

The previous prime is 64730563. The next prime is 64730657. The reversal of 64730615 is 51603746.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64730615 - 2⁶ = 64730551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6473057 + ... + 6473066.

It is an arithmetic number, because the mean of its divisors is an integer number (19419186).

Almost surely, 2^64730615 is an apocalyptic number.

64730615 is a deficient number, since it is larger than the sum of its proper divisors (12946129).

64730615 is a wasteful number, since it uses less digits than its factorization.

64730615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12946128.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 64730615 is about 8045.5338542573. The cubic root of 64730615 is about 401.5163589583.

The spelling of 64730615 in words is "sixty-four million, seven hundred thirty thousand, six hundred fifteen".