56156550101 has 2 divisors, whose sum is σ = 56156550102. Its totient is φ = 56156550100.

The previous prime is 56156550091. The next prime is 56156550113. The reversal of 56156550101 is 10105565165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34171371025 + 21985179076 = 184855^2 + 148274^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56156550101 is a prime.

It is a super-2 number, since 2×56156550101² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56156550161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28078275050 + 28078275051.

It is an arithmetic number, because the mean of its divisors is an integer number (28078275051).

Almost surely, 2^56156550101 is an apocalyptic number.

It is an amenable number.

56156550101 is a deficient number, since it is larger than the sum of its proper divisors (1).

56156550101 is an equidigital number, since it uses as much as digits as its factorization.

56156550101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 56156550101 in words is "fifty-six billion, one hundred fifty-six million, five hundred fifty thousand, one hundred one".