63442673493 has 4 divisors (see below), whose sum is σ = 84590231328. Its totient is φ = 42295115660.

The previous prime is 63442673491. The next prime is 63442673641. The reversal of 63442673493 is 39437624436.

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 63442673493 - 2¹ = 63442673491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63442673491) 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, 10573778913 + ... + 10573778918.

It is an arithmetic number, because the mean of its divisors is an integer number (21147557832).

Almost surely, 2^63442673493 is an apocalyptic number.

It is an amenable number.

63442673493 is a deficient number, since it is larger than the sum of its proper divisors (21147557835).

63442673493 is a wasteful number, since it uses less digits than its factorization.

63442673493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21147557834.

The product of its digits is 7838208, while the sum is 51.

The spelling of 63442673493 in words is "sixty-three billion, four hundred forty-two million, six hundred seventy-three thousand, four hundred ninety-three".