5667694398864 has 45 divisors (see below), whose sum is σ = 15861752471019. Its totient is φ = 1889221943520.

The previous prime is 5667694398853. The next prime is 5667694398881. The reversal of 5667694398864 is 4688934967665.

The square root of 5667694398864 is 2380692.

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

5667694398864 is a `hidden beast` number, since 5 + 6 + 67 + 6 + 94 + 398 + 86 + 4 = 666.

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, 28469109 + ... + 28667499.

Almost surely, 2^{5667694398864} is an apocalyptic number.

5667694398864 is the 2380692-nd square number.

It is an amenable number.

5667694398864 is an abundant number, since it is smaller than the sum of its proper divisors (10194058072155).

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

5667694398864 is an frugal number, since it uses more digits than its factorization.

5667694398864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396796 (or 198396 counting only the distinct ones).

The product of its digits is 11287019520, while the sum is 81.

Multiplying 5667694398864 by its sum of digits (81), we get a square (459083246307984 = 21426228²).

The spelling of 5667694398864 in words is "five trillion, six hundred sixty-seven billion, six hundred ninety-four million, three hundred ninety-eight thousand, eight hundred sixty-four".