64906774309739 has 8 divisors (see below), whose sum is σ = 65689086253392. Its totient is φ = 64124469571360.

The previous prime is 64906774309687. The next prime is 64906774309747. The reversal of 64906774309739 is 93790347760946.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64906774309739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64906774303739) 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, 17571809 + ... + 20942349.

It is an arithmetic number, because the mean of its divisors is an integer number (8211135781674).

Almost surely, 2^{64906774309739} is an apocalyptic number.

64906774309739 is a deficient number, since it is larger than the sum of its proper divisors (782311943653).

64906774309739 is a wasteful number, since it uses less digits than its factorization.

64906774309739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602637.

The product of its (nonzero) digits is 1296243648, while the sum is 74.

The spelling of 64906774309739 in words is "sixty-four trillion, nine hundred six billion, seven hundred seventy-four million, three hundred nine thousand, seven hundred thirty-nine".