72345487663 has 4 divisors (see below), whose sum is σ = 72539443768. Its totient is φ = 72151531560.

The previous prime is 72345487637. The next prime is 72345487667. The reversal of 72345487663 is 36678454327.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72345487663 - 2²⁹ = 71808616751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72345487667) 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, 96977493 + ... + 96978238.

It is an arithmetic number, because the mean of its divisors is an integer number (18134860942).

Almost surely, 2^72345487663 is an apocalyptic number.

72345487663 is a deficient number, since it is larger than the sum of its proper divisors (193956105).

72345487663 is a wasteful number, since it uses less digits than its factorization.

72345487663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193956104.

The product of its digits is 20321280, while the sum is 55.

The spelling of 72345487663 in words is "seventy-two billion, three hundred forty-five million, four hundred eighty-seven thousand, six hundred sixty-three".