72407471065 has 4 divisors (see below), whose sum is σ = 86888965284. Its totient is φ = 57925976848.

The previous prime is 72407471029. The next prime is 72407471083. The reversal of 72407471065 is 56017470427.

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 9949464009 + 62458007056 = 99747^2 + 249916^2 .

It is a cyclic number.

It is not a de Polignac number, because 72407471065 - 2¹⁷ = 72407339993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7240747102 + ... + 7240747111.

It is an arithmetic number, because the mean of its divisors is an integer number (21722241321).

Almost surely, 2^72407471065 is an apocalyptic number.

It is an amenable number.

72407471065 is a deficient number, since it is larger than the sum of its proper divisors (14481494219).

72407471065 is a wasteful number, since it uses less digits than its factorization.

72407471065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14481494218.

The product of its (nonzero) digits is 329280, while the sum is 43.

The spelling of 72407471065 in words is "seventy-two billion, four hundred seven million, four hundred seventy-one thousand, sixty-five".