511101091913 has 2 divisors, whose sum is σ = 511101091914. Its totient is φ = 511101091912.

The previous prime is 511101091901. The next prime is 511101091927. The reversal of 511101091913 is 319190101115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443273660944 + 67827430969 = 665788^2 + 260437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511101091913 is a prime.

It is a super-2 number, since 2×511101091913² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 511101091913.

It is not a weakly prime, because it can be changed into another prime (511101091013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255550545956 + 255550545957.

It is an arithmetic number, because the mean of its divisors is an integer number (255550545957).

Almost surely, 2^511101091913 is an apocalyptic number.

It is an amenable number.

511101091913 is a deficient number, since it is larger than the sum of its proper divisors (1).

511101091913 is an equidigital number, since it uses as much as digits as its factorization.

511101091913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1215, while the sum is 32.

The spelling of 511101091913 in words is "five hundred eleven billion, one hundred one million, ninety-one thousand, nine hundred thirteen".