64782891683524 has 27 divisors (see below), whose sum is σ = 131879687460717. Its totient is φ = 27764048143104.

The previous prime is 64782891683467. The next prime is 64782891683533. The reversal of 64782891683524 is 42538619828746.

It is a happy number.

The square root of 64782891683524 is 8048782.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 60611363208900 + 4171528474624 = 7785330^2 + 2042432^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 112395492 + ... + 112970404.

Almost surely, 2^{64782891683524} is an apocalyptic number.

64782891683524 is the 8048782-nd square number.

It is an amenable number.

64782891683524 is an abundant number, since it is smaller than the sum of its proper divisors (67096795777193).

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

64782891683524 is an frugal number, since it uses more digits than its factorization.

64782891683524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149844 (or 574922 counting only the distinct ones).

The product of its digits is 1114767360, while the sum is 73.

The spelling of 64782891683524 in words is "sixty-four trillion, seven hundred eighty-two billion, eight hundred ninety-one million, six hundred eighty-three thousand, five hundred twenty-four".