64740349651711 has 4 divisors (see below), whose sum is σ = 66972775501800. Its totient is φ = 62507923801624.

The previous prime is 64740349651667. The next prime is 64740349651759. The reversal of 64740349651711 is 11715694304746.

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 64740349651711 - 2⁹ = 64740349651199 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64740349651771) 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, 1116212925001 + ... + 1116212925058.

It is an arithmetic number, because the mean of its divisors is an integer number (16743193875450).

Almost surely, 2^{64740349651711} is an apocalyptic number.

64740349651711 is a deficient number, since it is larger than the sum of its proper divisors (2232425850089).

64740349651711 is a wasteful number, since it uses less digits than its factorization.

64740349651711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232425850088.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 64740349651711 in words is "sixty-four trillion, seven hundred forty billion, three hundred forty-nine million, six hundred fifty-one thousand, seven hundred eleven".