73405551979 has 8 divisors (see below), whose sum is σ = 74091343040. Its totient is φ = 72719985600.

The previous prime is 73405551953. The next prime is 73405552007. The reversal of 73405551979 is 97915550437.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73405551979 - 2¹⁵ = 73405519211 is a prime.

It is a super-2 number, since 2×73405551979² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73405551929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640414 + ... + 746284.

It is an arithmetic number, because the mean of its divisors is an integer number (9261417880).

Almost surely, 2^73405551979 is an apocalyptic number.

73405551979 is a deficient number, since it is larger than the sum of its proper divisors (685791061).

73405551979 is a wasteful number, since it uses less digits than its factorization.

73405551979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112341.

The product of its (nonzero) digits is 5953500, while the sum is 55.

The spelling of 73405551979 in words is "seventy-three billion, four hundred five million, five hundred fifty-one thousand, nine hundred seventy-nine".