421723274663 has 4 divisors (see below), whose sum is σ = 421726158048. Its totient is φ = 421720391280.

The previous prime is 421723274641. The next prime is 421723274671. The reversal of 421723274663 is 366472327124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421723274663 - 2⁸ = 421723274407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421723274683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1209878 + ... + 1518963.

It is an arithmetic number, because the mean of its divisors is an integer number (105431539512).

Almost surely, 2^421723274663 is an apocalyptic number.

421723274663 is a deficient number, since it is larger than the sum of its proper divisors (2883385).

421723274663 is a wasteful number, since it uses less digits than its factorization.

421723274663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883384.

The product of its digits is 2032128, while the sum is 47.

The spelling of 421723274663 in words is "four hundred twenty-one billion, seven hundred twenty-three million, two hundred seventy-four thousand, six hundred sixty-three".