73887390838 has 4 divisors (see below), whose sum is σ = 110831086260. Its totient is φ = 36943695418.

The previous prime is 73887390823. The next prime is 73887390947. The reversal of 73887390838 is 83809378837.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83809378837 = 17 ⋅4929963461.

It is a self number, because there is not a number n which added to its sum of digits gives 73887390838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18471847708 + ... + 18471847711.

It is an arithmetic number, because the mean of its divisors is an integer number (27707771565).

Almost surely, 2^73887390838 is an apocalyptic number.

73887390838 is a deficient number, since it is larger than the sum of its proper divisors (36943695422).

73887390838 is a wasteful number, since it uses less digits than its factorization.

73887390838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36943695421.

The product of its (nonzero) digits is 48771072, while the sum is 64.

The spelling of 73887390838 in words is "seventy-three billion, eight hundred eighty-seven million, three hundred ninety thousand, eight hundred thirty-eight".