64520767713782 has 16 divisors (see below), whose sum is σ = 98126252183232. Its totient is φ = 31813438118280.

The previous prime is 64520767713781. The next prime is 64520767713791. The reversal of 64520767713782 is 28731776702546.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64520767713781) 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, 355191944 + ... + 355373547.

It is an arithmetic number, because the mean of its divisors is an integer number (6132890761452).

Almost surely, 2^{64520767713782} is an apocalyptic number.

64520767713782 is a deficient number, since it is larger than the sum of its proper divisors (33605484469450).

64520767713782 is a wasteful number, since it uses less digits than its factorization.

64520767713782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710566123.

The product of its (nonzero) digits is 165957120, while the sum is 65.

The spelling of 64520767713782 in words is "sixty-four trillion, five hundred twenty billion, seven hundred sixty-seven million, seven hundred thirteen thousand, seven hundred eighty-two".