72687258649 has 8 divisors (see below), whose sum is σ = 79445657088. Its totient is φ = 66204713280.

The previous prime is 72687258643. The next prime is 72687258659. The reversal of 72687258649 is 94685278627.

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

It is a cyclic number.

It is not a de Polignac number, because 72687258649 - 2⁷ = 72687258521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72687258643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68962717 + ... + 68963770.

It is an arithmetic number, because the mean of its divisors is an integer number (9930707136).

Almost surely, 2^72687258649 is an apocalyptic number.

It is an amenable number.

72687258649 is a deficient number, since it is larger than the sum of its proper divisors (6758398439).

72687258649 is a wasteful number, since it uses less digits than its factorization.

72687258649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137926535.

The product of its digits is 81285120, while the sum is 64.

The spelling of 72687258649 in words is "seventy-two billion, six hundred eighty-seven million, two hundred fifty-eight thousand, six hundred forty-nine".