72174223722621 has 8 divisors (see below), whose sum is σ = 96234505178560. Its totient is φ = 48115045707552.

The previous prime is 72174223722617. The next prime is 72174223722721. The reversal of 72174223722621 is 12622732247127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72174223722621 - 2² = 72174223722617 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 (72174223722121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275707585 + ... + 275969238.

It is an arithmetic number, because the mean of its divisors is an integer number (12029313147320).

Almost surely, 2^{72174223722621} is an apocalyptic number.

It is an amenable number.

72174223722621 is a deficient number, since it is larger than the sum of its proper divisors (24060281455939).

72174223722621 is a wasteful number, since it uses less digits than its factorization.

72174223722621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551720435.

The product of its digits is 1580544, while the sum is 48.

Adding to 72174223722621 its reverse (12622732247127), we get a palindrome (84796955969748).

The spelling of 72174223722621 in words is "seventy-two trillion, one hundred seventy-four billion, two hundred twenty-three million, seven hundred twenty-two thousand, six hundred twenty-one".