73623055421 has 4 divisors (see below), whose sum is σ = 76161781500. Its totient is φ = 71084329344.

The previous prime is 73623055417. The next prime is 73623055447. The reversal of 73623055421 is 12455032637.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59577487225 + 14045568196 = 244085^2 + 118514^2 .

It is a cyclic number.

It is not a de Polignac number, because 73623055421 - 2² = 73623055417 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 (73623055411) 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, 1269362996 + ... + 1269363053.

It is an arithmetic number, because the mean of its divisors is an integer number (19040445375).

Almost surely, 2^73623055421 is an apocalyptic number.

It is an amenable number.

73623055421 is a deficient number, since it is larger than the sum of its proper divisors (2538726079).

73623055421 is a wasteful number, since it uses less digits than its factorization.

73623055421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538726078.

The product of its (nonzero) digits is 151200, while the sum is 38.

The spelling of 73623055421 in words is "seventy-three billion, six hundred twenty-three million, fifty-five thousand, four hundred twenty-one".