15071443643 has 2 divisors, whose sum is σ = 15071443644. Its totient is φ = 15071443642.

The previous prime is 15071443613. The next prime is 15071443661. The reversal of 15071443643 is 34634417051.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15071443643 - 2²² = 15067249339 is a prime.

It is a super-2 number, since 2×15071443643² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15071443597 and 15071443606.

It is not a weakly prime, because it can be changed into another prime (15071443603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7535721821 + 7535721822.

It is an arithmetic number, because the mean of its divisors is an integer number (7535721822).

Almost surely, 2^15071443643 is an apocalyptic number.

15071443643 is a deficient number, since it is larger than the sum of its proper divisors (1).

15071443643 is an equidigital number, since it uses as much as digits as its factorization.

15071443643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 15071443643 in words is "fifteen billion, seventy-one million, four hundred forty-three thousand, six hundred forty-three".