72392833857 has 4 divisors (see below), whose sum is σ = 96523778480. Its totient is φ = 48261889236.

The previous prime is 72392833771. The next prime is 72392833861. The reversal of 72392833857 is 75833829327.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75833829327 = 3 ⋅25277943109.

It is not a de Polignac number, because 72392833857 - 2¹⁴ = 72392817473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72392833797 and 72392833806.

It is not an unprimeable number, because it can be changed into a prime (72392833897) 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, 12065472307 + ... + 12065472312.

It is an arithmetic number, because the mean of its divisors is an integer number (24130944620).

Almost surely, 2^72392833857 is an apocalyptic number.

It is an amenable number.

72392833857 is a deficient number, since it is larger than the sum of its proper divisors (24130944623).

72392833857 is a wasteful number, since it uses less digits than its factorization.

72392833857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24130944622.

The product of its digits is 15240960, while the sum is 57.

The spelling of 72392833857 in words is "seventy-two billion, three hundred ninety-two million, eight hundred thirty-three thousand, eight hundred fifty-seven".