72985155827 has 4 divisors (see below), whose sum is σ = 72985939296. Its totient is φ = 72984372360.

The previous prime is 72985155821. The next prime is 72985155883. The reversal of 72985155827 is 72855158927.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 72985155827 - 2³⁴ = 55805286643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72985155821) 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, 229643 + ... + 445764.

It is an arithmetic number, because the mean of its divisors is an integer number (18246484824).

Almost surely, 2^72985155827 is an apocalyptic number.

72985155827 is a deficient number, since it is larger than the sum of its proper divisors (783469).

72985155827 is a wasteful number, since it uses less digits than its factorization.

72985155827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783468.

The product of its digits is 14112000, while the sum is 59.

The spelling of 72985155827 in words is "seventy-two billion, nine hundred eighty-five million, one hundred fifty-five thousand, eight hundred twenty-seven".