73503820406 has 8 divisors (see below), whose sum is σ = 110694997224. Its totient is φ = 36605488000.

The previous prime is 73503820399. The next prime is 73503820409. The reversal of 73503820406 is 60402830537.

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

It is a super-2 number, since 2×73503820406² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73503820406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73503820409) 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, 73210475 + ... + 73211478.

It is an arithmetic number, because the mean of its divisors is an integer number (13836874653).

Almost surely, 2^73503820406 is an apocalyptic number.

73503820406 is a deficient number, since it is larger than the sum of its proper divisors (37191176818).

73503820406 is a wasteful number, since it uses less digits than its factorization.

73503820406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146422206.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 73503820406 in words is "seventy-three billion, five hundred three million, eight hundred twenty thousand, four hundred six".