15641675869 has 2 divisors, whose sum is σ = 15641675870. Its totient is φ = 15641675868.

The previous prime is 15641675867. The next prime is 15641675879. The reversal of 15641675869 is 96857614651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9199687225 + 6441988644 = 95915^2 + 80262^2 .

It is a cyclic number.

It is not a de Polignac number, because 15641675869 - 2¹ = 15641675867 is a prime.

It is a super-2 number, since 2×15641675869² (a number of 21 digits) contains 22 as substring.

Together with 15641675867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15641675867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7820837934 + 7820837935.

It is an arithmetic number, because the mean of its divisors is an integer number (7820837935).

Almost surely, 2^15641675869 is an apocalyptic number.

It is an amenable number.

15641675869 is a deficient number, since it is larger than the sum of its proper divisors (1).

15641675869 is an equidigital number, since it uses as much as digits as its factorization.

15641675869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10886400, while the sum is 58.

The spelling of 15641675869 in words is "fifteen billion, six hundred forty-one million, six hundred seventy-five thousand, eight hundred sixty-nine".