73421778783 has 16 divisors (see below), whose sum is σ = 98298406400. Its totient is φ = 48746655360.

The previous prime is 73421778779. The next prime is 73421778791. The reversal of 73421778783 is 38787712437.

It is not a de Polignac number, because 73421778783 - 2² = 73421778779 is a prime.

It is a super-2 number, since 2×73421778783² (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 (73421778713) 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, 2046423 + ... + 2081991.

It is an arithmetic number, because the mean of its divisors is an integer number (6143650400).

Almost surely, 2^73421778783 is an apocalyptic number.

73421778783 is a deficient number, since it is larger than the sum of its proper divisors (24876627617).

73421778783 is a wasteful number, since it uses less digits than its factorization.

73421778783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38382.

The product of its digits is 11063808, while the sum is 57.

The spelling of 73421778783 in words is "seventy-three billion, four hundred twenty-one million, seven hundred seventy-eight thousand, seven hundred eighty-three".