16135543631 has 2 divisors, whose sum is σ = 16135543632. Its totient is φ = 16135543630.

The previous prime is 16135543609. The next prime is 16135543687. The reversal of 16135543631 is 13634553161.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16135543631 is a prime.

It is a super-2 number, since 2×16135543631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16135543031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8067771815 + 8067771816.

It is an arithmetic number, because the mean of its divisors is an integer number (8067771816).

Almost surely, 2^16135543631 is an apocalyptic number.

16135543631 is a deficient number, since it is larger than the sum of its proper divisors (1).

16135543631 is an equidigital number, since it uses as much as digits as its factorization.

16135543631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 38.

The spelling of 16135543631 in words is "sixteen billion, one hundred thirty-five million, five hundred forty-three thousand, six hundred thirty-one".