64704379747 has 4 divisors (see below), whose sum is σ = 73947862576. Its totient is φ = 55460896920.

The previous prime is 64704379739. The next prime is 64704379759. The reversal of 64704379747 is 74797340746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74797340746 = 2 ⋅37398670373.

It is a cyclic number.

It is not a de Polignac number, because 64704379747 - 2³ = 64704379739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64704379691 and 64704379700.

It is not an unprimeable number, because it can be changed into a prime (64704379247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4621741404 + ... + 4621741417.

It is an arithmetic number, because the mean of its divisors is an integer number (18486965644).

Almost surely, 2^64704379747 is an apocalyptic number.

64704379747 is a deficient number, since it is larger than the sum of its proper divisors (9243482829).

64704379747 is an equidigital number, since it uses as much as digits as its factorization.

64704379747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9243482828.

The product of its (nonzero) digits is 24893568, while the sum is 58.

The spelling of 64704379747 in words is "sixty-four billion, seven hundred four million, three hundred seventy-nine thousand, seven hundred forty-seven".