64706345640774 has 48 divisors (see below), whose sum is σ = 143636120226144. Its totient is φ = 21039842678400.

The previous prime is 64706345640767. The next prime is 64706345640779. The reversal of 64706345640774 is 47704654360746.

64706345640774 is a `hidden beast` number, since 6 + 4 + 7 + 0 + 63 + 4 + 564 + 0 + 7 + 7 + 4 = 666.

It is a super-2 number, since 2×64706345640774² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64706345640779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 566562 + ... + 11390069.

It is an arithmetic number, because the mean of its divisors is an integer number (2992419171378).

Almost surely, 2^{64706345640774} is an apocalyptic number.

64706345640774 is an abundant number, since it is smaller than the sum of its proper divisors (78929774585370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64706345640774 is a wasteful number, since it uses less digits than its factorization.

64706345640774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11964013 (or 11964010 counting only the distinct ones).

The product of its (nonzero) digits is 284497920, while the sum is 63.

The spelling of 64706345640774 in words is "sixty-four trillion, seven hundred six billion, three hundred forty-five million, six hundred forty thousand, seven hundred seventy-four".