16061515693 has 2 divisors, whose sum is σ = 16061515694. Its totient is φ = 16061515692.

The previous prime is 16061515637. The next prime is 16061515709. The reversal of 16061515693 is 39651516061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16018192969 + 43322724 = 126563^2 + 6582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16061515693 is a prime.

It is a super-3 number, since 3×16061515693³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16061515633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8030757846 + 8030757847.

It is an arithmetic number, because the mean of its divisors is an integer number (8030757847).

Almost surely, 2^16061515693 is an apocalyptic number.

It is an amenable number.

16061515693 is a deficient number, since it is larger than the sum of its proper divisors (1).

16061515693 is an equidigital number, since it uses as much as digits as its factorization.

16061515693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 43.

The spelling of 16061515693 in words is "sixteen billion, sixty-one million, five hundred fifteen thousand, six hundred ninety-three".