56789298521 has 2 divisors, whose sum is σ = 56789298522. Its totient is φ = 56789298520.

The previous prime is 56789298469. The next prime is 56789298589. The reversal of 56789298521 is 12589298765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50447406025 + 6341892496 = 224605^2 + 79636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56789298521 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (56789298421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28394649260 + 28394649261.

It is an arithmetic number, because the mean of its divisors is an integer number (28394649261).

Almost surely, 2^56789298521 is an apocalyptic number.

It is an amenable number.

56789298521 is a deficient number, since it is larger than the sum of its proper divisors (1).

56789298521 is an equidigital number, since it uses as much as digits as its factorization.

56789298521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21772800, while the sum is 62.

The spelling of 56789298521 in words is "fifty-six billion, seven hundred eighty-nine million, two hundred ninety-eight thousand, five hundred twenty-one".