56197864399 has 4 divisors (see below), whose sum is σ = 56754279000. Its totient is φ = 55641449800.

The previous prime is 56197864391. The next prime is 56197864493. The reversal of 56197864399 is 99346879165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99346879165 = 5 ⋅19869375833.

It is a cyclic number.

It is not a de Polignac number, because 56197864399 - 2³ = 56197864391 is a prime.

It is a super-4 number, since 4×56197864399⁴ (a number of 44 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56197864391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278207149 + ... + 278207350.

It is an arithmetic number, because the mean of its divisors is an integer number (14188569750).

Almost surely, 2^56197864399 is an apocalyptic number.

56197864399 is a deficient number, since it is larger than the sum of its proper divisors (556414601).

56197864399 is a wasteful number, since it uses less digits than its factorization.

56197864399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556414600.

The product of its digits is 88179840, while the sum is 67.

The spelling of 56197864399 in words is "fifty-six billion, one hundred ninety-seven million, eight hundred sixty-four thousand, three hundred ninety-nine".