72465409636 has 9 divisors (see below), whose sum is σ = 126815409049. Its totient is φ = 36232435624.

The previous prime is 72465409589. The next prime is 72465409637. The reversal of 72465409636 is 63690456427.

The square root of 72465409636 is 269194.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4210712100 + 68254697536 = 64890^2 + 261256^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72465409637) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 471090 + ... + 605686.

Almost surely, 2^72465409636 is an apocalyptic number.

72465409636 is the 269194-th square number.

It is an amenable number.

72465409636 is a deficient number, since it is larger than the sum of its proper divisors (54349999413).

72465409636 is an frugal number, since it uses more digits than its factorization.

72465409636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269198 (or 134599 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 72465409636 in words is "seventy-two billion, four hundred sixty-five million, four hundred nine thousand, six hundred thirty-six".