73621720241 has 4 divisors (see below), whose sum is σ = 73622272512. Its totient is φ = 73621167972.

The previous prime is 73621720199. The next prime is 73621720243. The reversal of 73621720241 is 14202712637.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14202712637 = 59 ⋅240723943.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73621720241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73621720243) 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, 61160 + ... + 388566.

It is an arithmetic number, because the mean of its divisors is an integer number (18405568128).

Almost surely, 2^73621720241 is an apocalyptic number.

It is an amenable number.

73621720241 is a deficient number, since it is larger than the sum of its proper divisors (552271).

73621720241 is a wasteful number, since it uses less digits than its factorization.

73621720241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552270.

The product of its (nonzero) digits is 28224, while the sum is 35.

The spelling of 73621720241 in words is "seventy-three billion, six hundred twenty-one million, seven hundred twenty thousand, two hundred forty-one".