64539000782 has 4 divisors (see below), whose sum is σ = 96808501176. Its totient is φ = 32269500390.

The previous prime is 64539000769. The next prime is 64539000793. The reversal of 64539000782 is 28700093546.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×64539000782² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16134750194 + ... + 16134750197.

It is an arithmetic number, because the mean of its divisors is an integer number (24202125294).

Almost surely, 2^64539000782 is an apocalyptic number.

64539000782 is a deficient number, since it is larger than the sum of its proper divisors (32269500394).

64539000782 is a wasteful number, since it uses less digits than its factorization.

64539000782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32269500393.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 64539000782 in words is "sixty-four billion, five hundred thirty-nine million, seven hundred eighty-two", and thus it is an aban number.