72854918421 has 8 divisors (see below), whose sum is σ = 98231351040. Its totient is φ = 48024215712.

The previous prime is 72854918419. The next prime is 72854918441. The reversal of 72854918421 is 12481945827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72854918421 - 2¹ = 72854918419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72854918441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136432165 + ... + 136432698.

It is an arithmetic number, because the mean of its divisors is an integer number (12278918880).

Almost surely, 2^72854918421 is an apocalyptic number.

It is an amenable number.

72854918421 is a deficient number, since it is larger than the sum of its proper divisors (25376432619).

72854918421 is a wasteful number, since it uses less digits than its factorization.

72854918421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272864955.

The product of its digits is 1290240, while the sum is 51.

The spelling of 72854918421 in words is "seventy-two billion, eight hundred fifty-four million, nine hundred eighteen thousand, four hundred twenty-one".