11137765531 has 2 divisors, whose sum is σ = 11137765532. Its totient is φ = 11137765530.

The previous prime is 11137765523. The next prime is 11137765559. The reversal of 11137765531 is 13556773111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11137765531 - 2³ = 11137765523 is a prime.

It is a super-2 number, since 2×11137765531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11137765031) 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, 5568882765 + 5568882766.

It is an arithmetic number, because the mean of its divisors is an integer number (5568882766).

Almost surely, 2^11137765531 is an apocalyptic number.

11137765531 is a deficient number, since it is larger than the sum of its proper divisors (1).

11137765531 is an equidigital number, since it uses as much as digits as its factorization.

11137765531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66150, while the sum is 40.

The spelling of 11137765531 in words is "eleven billion, one hundred thirty-seven million, seven hundred sixty-five thousand, five hundred thirty-one".