56216464430989 has 2 divisors, whose sum is σ = 56216464430990. Its totient is φ = 56216464430988.

The previous prime is 56216464430981. The next prime is 56216464431037. The reversal of 56216464430989 is 98903446461265.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29562817608900 + 26653646822089 = 5437170^2 + 5162717^2 .

It is a cyclic number.

It is not a de Polignac number, because 56216464430989 - 2³ = 56216464430981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56216464430981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28108232215494 + 28108232215495.

It is an arithmetic number, because the mean of its divisors is an integer number (28108232215495).

Almost surely, 2^{56216464430989} is an apocalyptic number.

It is an amenable number.

56216464430989 is a deficient number, since it is larger than the sum of its proper divisors (1).

56216464430989 is an equidigital number, since it uses as much as digits as its factorization.

56216464430989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268738560, while the sum is 67.

The spelling of 56216464430989 in words is "fifty-six trillion, two hundred sixteen billion, four hundred sixty-four million, four hundred thirty thousand, nine hundred eighty-nine".