72081610 has 8 divisors (see below), whose sum is σ = 129746916. Its totient is φ = 28832640.

The previous prime is 72081593. The next prime is 72081613. The reversal of 72081610 is 1618027.

It can be written as a sum of positive squares in 2 ways, for example, as 72029169 + 52441 = 8487^2 + 229^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72081613) 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, 3604071 + ... + 3604090.

Almost surely, 2^72081610 is an apocalyptic number.

72081610 is a deficient number, since it is larger than the sum of its proper divisors (57665306).

72081610 is a wasteful number, since it uses less digits than its factorization.

72081610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7208168.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 72081610 is about 8490.0889276850. The cubic root of 72081610 is about 416.1738864098.

Adding to 72081610 its reverse (1618027), we get a palindrome (73699637).

The spelling of 72081610 in words is "seventy-two million, eighty-one thousand, six hundred ten".