56837731019 has 2 divisors, whose sum is σ = 56837731020. Its totient is φ = 56837731018.

The previous prime is 56837730977. The next prime is 56837731021. The reversal of 56837731019 is 91013773865.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56837731019 is a prime.

It is a super-2 number, since 2×56837731019² (a number of 22 digits) contains 22 as substring.

Together with 56837731021, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56837731079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28418865509 + 28418865510.

It is an arithmetic number, because the mean of its divisors is an integer number (28418865510).

Almost surely, 2^56837731019 is an apocalyptic number.

56837731019 is a deficient number, since it is larger than the sum of its proper divisors (1).

56837731019 is an equidigital number, since it uses as much as digits as its factorization.

56837731019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952560, while the sum is 50.

The spelling of 56837731019 in words is "fifty-six billion, eight hundred thirty-seven million, seven hundred thirty-one thousand, nineteen".