15514450643 has 2 divisors, whose sum is σ = 15514450644. Its totient is φ = 15514450642.

The previous prime is 15514450621. The next prime is 15514450661. The reversal of 15514450643 is 34605441551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15514450643 - 2⁶ = 15514450579 is a prime.

It is a super-2 number, since 2×15514450643² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15514450597 and 15514450606.

It is not a weakly prime, because it can be changed into another prime (15514450543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7757225321 + 7757225322.

It is an arithmetic number, because the mean of its divisors is an integer number (7757225322).

Almost surely, 2^15514450643 is an apocalyptic number.

15514450643 is a deficient number, since it is larger than the sum of its proper divisors (1).

15514450643 is an equidigital number, since it uses as much as digits as its factorization.

15514450643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 15514450643 in words is "fifteen billion, five hundred fourteen million, four hundred fifty thousand, six hundred forty-three".