72261357205 has 8 divisors (see below), whose sum is σ = 86716291032. Its totient is φ = 57807310848.

The previous prime is 72261357191. The next prime is 72261357221. The reversal of 72261357205 is 50275316227.

It can be written as a sum of positive squares in 4 ways, for example, as 55217010289 + 17044346916 = 234983^2 + 130554^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 72261357205 - 2²⁷ = 72127139477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27204 + ... + 381133.

It is an arithmetic number, because the mean of its divisors is an integer number (10839536379).

Almost surely, 2^72261357205 is an apocalyptic number.

It is an amenable number.

72261357205 is a deficient number, since it is larger than the sum of its proper divisors (14454933827).

72261357205 is a wasteful number, since it uses less digits than its factorization.

72261357205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443735.

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 72261357205 in words is "seventy-two billion, two hundred sixty-one million, three hundred fifty-seven thousand, two hundred five".