421445543963 has 2 divisors, whose sum is σ = 421445543964. Its totient is φ = 421445543962.

The previous prime is 421445543951. The next prime is 421445544173. The reversal of 421445543963 is 369345544124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421445543963 - 2⁴ = 421445543947 is a prime.

It is a super-3 number, since 3×421445543963³ (a number of 36 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (421445543863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210722771981 + 210722771982.

It is an arithmetic number, because the mean of its divisors is an integer number (210722771982).

Almost surely, 2^421445543963 is an apocalyptic number.

421445543963 is a deficient number, since it is larger than the sum of its proper divisors (1).

421445543963 is an equidigital number, since it uses as much as digits as its factorization.

421445543963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6220800, while the sum is 50.

The spelling of 421445543963 in words is "four hundred twenty-one billion, four hundred forty-five million, five hundred forty-three thousand, nine hundred sixty-three".