72237017057 has 4 divisors (see below), whose sum is σ = 72275835156. Its totient is φ = 72198198960.

The previous prime is 72237017051. The next prime is 72237017077. The reversal of 72237017057 is 75071073227.

It is a happy number.

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 24782315776 + 47454701281 = 157424^2 + 217841^2 .

It is a cyclic number.

It is not a de Polignac number, because 72237017057 - 2⁶ = 72237016993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72237017051) 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, 19406258 + ... + 19409979.

It is an arithmetic number, because the mean of its divisors is an integer number (18068958789).

Almost surely, 2^72237017057 is an apocalyptic number.

It is an amenable number.

72237017057 is a deficient number, since it is larger than the sum of its proper divisors (38818099).

72237017057 is a wasteful number, since it uses less digits than its factorization.

72237017057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38818098.

The product of its (nonzero) digits is 144060, while the sum is 41.

The spelling of 72237017057 in words is "seventy-two billion, two hundred thirty-seven million, seventeen thousand, fifty-seven".