73253126621 has 8 divisors (see below), whose sum is σ = 75561477720. Its totient is φ = 70962067008.

The previous prime is 73253126587. The next prime is 73253126641. The reversal of 73253126621 is 12662135237.

It can be written as a sum of positive squares in 4 ways, for example, as 28652332900 + 44600793721 = 169270^2 + 211189^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73253126621 is a prime.

It is a super-3 number, since 3×73253126621³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73253126641) 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, 4314266 + ... + 4331211.

It is an arithmetic number, because the mean of its divisors is an integer number (9445184715).

Almost surely, 2^73253126621 is an apocalyptic number.

It is an amenable number.

73253126621 is a deficient number, since it is larger than the sum of its proper divisors (2308351099).

73253126621 is a wasteful number, since it uses less digits than its factorization.

73253126621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8645743.

The product of its digits is 90720, while the sum is 38.

The spelling of 73253126621 in words is "seventy-three billion, two hundred fifty-three million, one hundred twenty-six thousand, six hundred twenty-one".