72522236144773 has 16 divisors (see below), whose sum is σ = 77121251743536. Its totient is φ = 67960246865920.

The previous prime is 72522236144723. The next prime is 72522236144797. The reversal of 72522236144773 is 37744163222527.

It can be written as a sum of positive squares in 8 ways, for example, as 4715855246404 + 67806380898369 = 2171602^2 + 8234463^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72522236144773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72522236144723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91027215 + ... + 91820467.

It is an arithmetic number, because the mean of its divisors is an integer number (4820078233971).

Almost surely, 2^{72522236144773} is an apocalyptic number.

It is an amenable number.

72522236144773 is a deficient number, since it is larger than the sum of its proper divisors (4599015598763).

72522236144773 is a wasteful number, since it uses less digits than its factorization.

72522236144773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816584.

The product of its digits is 23708160, while the sum is 55.

The spelling of 72522236144773 in words is "seventy-two trillion, five hundred twenty-two billion, two hundred thirty-six million, one hundred forty-four thousand, seven hundred seventy-three".