73663627973 has 16 divisors (see below), whose sum is σ = 82293657600. Its totient is φ = 65498958720.

The previous prime is 73663627937. The next prime is 73663627991. The reversal of 73663627973 is 37972636637.

It is a happy number.

It is not a de Polignac number, because 73663627973 - 2¹⁸ = 73663365829 is a prime.

It is a super-2 number, since 2×73663627973² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73663627993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 832613 + ... + 916826.

It is an arithmetic number, because the mean of its divisors is an integer number (5143353600).

Almost surely, 2^73663627973 is an apocalyptic number.

It is an amenable number.

73663627973 is a deficient number, since it is larger than the sum of its proper divisors (8630029627).

73663627973 is a wasteful number, since it uses less digits than its factorization.

73663627973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749572.

The product of its digits is 36006768, while the sum is 59.

The spelling of 73663627973 in words is "seventy-three billion, six hundred sixty-three million, six hundred twenty-seven thousand, nine hundred seventy-three".