15645952943 has 2 divisors, whose sum is σ = 15645952944. Its totient is φ = 15645952942.

The previous prime is 15645952919. The next prime is 15645952961. The reversal of 15645952943 is 34925954651.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15645952943 - 2¹⁸ = 15645690799 is a prime.

It is a super-2 number, since 2×15645952943² (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 (15645952963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7822976471 + 7822976472.

It is an arithmetic number, because the mean of its divisors is an integer number (7822976472).

Almost surely, 2^15645952943 is an apocalyptic number.

15645952943 is a deficient number, since it is larger than the sum of its proper divisors (1).

15645952943 is an equidigital number, since it uses as much as digits as its factorization.

15645952943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832000, while the sum is 53.

The spelling of 15645952943 in words is "fifteen billion, six hundred forty-five million, nine hundred fifty-two thousand, nine hundred forty-three".