73738910221 has 4 divisors (see below), whose sum is σ = 73741763392. Its totient is φ = 73736057052.

The previous prime is 73738910197. The next prime is 73738910227. The reversal of 73738910221 is 12201983737.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73738910221 - 2²⁷ = 73604692493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73738910227) 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, 1387461 + ... + 1439626.

It is an arithmetic number, because the mean of its divisors is an integer number (18435440848).

Almost surely, 2^73738910221 is an apocalyptic number.

It is an amenable number.

73738910221 is a deficient number, since it is larger than the sum of its proper divisors (2853171).

73738910221 is a wasteful number, since it uses less digits than its factorization.

73738910221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853170.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 73738910221 in words is "seventy-three billion, seven hundred thirty-eight million, nine hundred ten thousand, two hundred twenty-one".