42463717921 has 4 divisors (see below), whose sum is σ = 42491601072. Its totient is φ = 42435834772.

The previous prime is 42463717871. The next prime is 42463717931. The reversal of 42463717921 is 12971736424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42463717921 - 2²¹ = 42461620769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42463717931) 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, 13939291 + ... + 13942336.

It is an arithmetic number, because the mean of its divisors is an integer number (10622900268).

Almost surely, 2^42463717921 is an apocalyptic number.

It is an amenable number.

42463717921 is a deficient number, since it is larger than the sum of its proper divisors (27883151).

42463717921 is a wasteful number, since it uses less digits than its factorization.

42463717921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27883150.

The product of its digits is 508032, while the sum is 46.

It can be divided in two parts, 42463 and 717921, that added together give a square (760384 = 872²).

The spelling of 42463717921 in words is "forty-two billion, four hundred sixty-three million, seven hundred seventeen thousand, nine hundred twenty-one".