72345487636 has 24 divisors (see below), whose sum is σ = 133937720000. Its totient is φ = 34096702464.

The previous prime is 72345487633. The next prime is 72345487637. The reversal of 72345487636 is 63678454327.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72345487633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2376621 + ... + 2406868.

Almost surely, 2^72345487636 is an apocalyptic number.

72345487636 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

72345487636 is a deficient number, since it is larger than the sum of its proper divisors (61592232364).

72345487636 is a wasteful number, since it uses less digits than its factorization.

72345487636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4783711 (or 4783709 counting only the distinct ones).

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

The spelling of 72345487636 in words is "seventy-two billion, three hundred forty-five million, four hundred eighty-seven thousand, six hundred thirty-six".