72101685793 has 4 divisors (see below), whose sum is σ = 73014365440. Its totient is φ = 71189006148.

The previous prime is 72101685791. The next prime is 72101685797. The reversal of 72101685793 is 39758610127.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72101685793 - 2¹ = 72101685791 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72101685791) 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, 456339705 + ... + 456339862.

It is an arithmetic number, because the mean of its divisors is an integer number (18253591360).

Almost surely, 2^72101685793 is an apocalyptic number.

It is an amenable number.

72101685793 is a deficient number, since it is larger than the sum of its proper divisors (912679647).

72101685793 is an equidigital number, since it uses as much as digits as its factorization.

72101685793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912679646.

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 72101685793 in words is "seventy-two billion, one hundred one million, six hundred eighty-five thousand, seven hundred ninety-three".