72522236144737 has 4 divisors (see below), whose sum is σ = 72523051007940. Its totient is φ = 72521421281536.

The previous prime is 72522236144723. The next prime is 72522236144797. The reversal of 72522236144737 is 73744163222527.

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 52914334802176 + 19607901342561 = 7274224^2 + 4428081^2 .

It is a cyclic number.

It is not a de Polignac number, because 72522236144737 - 2³¹ = 72520088661089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72522236144717) 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, 407298088 + ... + 407476105.

It is an arithmetic number, because the mean of its divisors is an integer number (18130762751985).

Almost surely, 2^{72522236144737} is an apocalyptic number.

It is an amenable number.

72522236144737 is a deficient number, since it is larger than the sum of its proper divisors (814863203).

72522236144737 is an equidigital number, since it uses as much as digits as its factorization.

72522236144737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814863202.

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

The spelling of 72522236144737 in words is "seventy-two trillion, five hundred twenty-two billion, two hundred thirty-six million, one hundred forty-four thousand, seven hundred thirty-seven".