72730286677655 has 4 divisors (see below), whose sum is σ = 87276344013192. Its totient is φ = 58184229342120.

The previous prime is 72730286677649. The next prime is 72730286677771. The reversal of 72730286677655 is 55677668203727.

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

It is not a de Polignac number, because 72730286677655 - 2¹² = 72730286673559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7273028667761 + ... + 7273028667770.

It is an arithmetic number, because the mean of its divisors is an integer number (21819086003298).

Almost surely, 2^{72730286677655} is an apocalyptic number.

72730286677655 is a deficient number, since it is larger than the sum of its proper divisors (14546057335537).

72730286677655 is a wasteful number, since it uses less digits than its factorization.

72730286677655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14546057335536.

The product of its (nonzero) digits is 1244678400, while the sum is 71.

The spelling of 72730286677655 in words is "seventy-two trillion, seven hundred thirty billion, two hundred eighty-six million, six hundred seventy-seven thousand, six hundred fifty-five".