56156031511 has 2 divisors, whose sum is σ = 56156031512. Its totient is φ = 56156031510.

The previous prime is 56156031509. The next prime is 56156031521. The reversal of 56156031511 is 11513065165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56156031511 - 2¹ = 56156031509 is a prime.

Together with 56156031509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56156031521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28078015755 + 28078015756.

It is an arithmetic number, because the mean of its divisors is an integer number (28078015756).

Almost surely, 2^56156031511 is an apocalyptic number.

56156031511 is a deficient number, since it is larger than the sum of its proper divisors (1).

56156031511 is an equidigital number, since it uses as much as digits as its factorization.

56156031511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500, while the sum is 34.

Adding to 56156031511 its reverse (11513065165), we get a palindrome (67669096676).

The spelling of 56156031511 in words is "fifty-six billion, one hundred fifty-six million, thirty-one thousand, five hundred eleven".