8720023655 has 16 divisors (see below), whose sum is σ = 12282104640. Its totient is φ = 5817837312.

The previous prime is 8720023619. The next prime is 8720023661. The reversal of 8720023655 is 5563200278.

It is not a de Polignac number, because 8720023655 - 2²⁶ = 8652914791 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3365510 + ... + 3368099.

It is an arithmetic number, because the mean of its divisors is an integer number (767631540).

Almost surely, 2^8720023655 is an apocalyptic number.

8720023655 is a deficient number, since it is larger than the sum of its proper divisors (3562080985).

8720023655 is a wasteful number, since it uses less digits than its factorization.

8720023655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6733658.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 8720023655 is about 93381.0668979531. The cubic root of 8720023655 is about 2058.2867943313.

The spelling of 8720023655 in words is "eight billion, seven hundred twenty million, twenty-three thousand, six hundred fifty-five".