15691954933 has 2 divisors, whose sum is σ = 15691954934. Its totient is φ = 15691954932.

The previous prime is 15691954919. The next prime is 15691955093. The reversal of 15691954933 is 33945919651.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15564558564 + 127396369 = 124758^2 + 11287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15691954933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15691954903) 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, 7845977466 + 7845977467.

It is an arithmetic number, because the mean of its divisors is an integer number (7845977467).

Almost surely, 2^15691954933 is an apocalyptic number.

It is an amenable number.

15691954933 is a deficient number, since it is larger than the sum of its proper divisors (1).

15691954933 is an equidigital number, since it uses as much as digits as its factorization.

15691954933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3936600, while the sum is 55.

The spelling of 15691954933 in words is "fifteen billion, six hundred ninety-one million, nine hundred fifty-four thousand, nine hundred thirty-three".