72821428043 has 32 divisors (see below), whose sum is σ = 90194227200. Its totient is φ = 57252666240.

The previous prime is 72821428019. The next prime is 72821428051. The reversal of 72821428043 is 34082412827.

It is not a de Polignac number, because 72821428043 - 2⁸ = 72821427787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72821428093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17763608 + ... + 17767706.

It is an arithmetic number, because the mean of its divisors is an integer number (2818569600).

Almost surely, 2^72821428043 is an apocalyptic number.

72821428043 is a deficient number, since it is larger than the sum of its proper divisors (17372799157).

72821428043 is a wasteful number, since it uses less digits than its factorization.

72821428043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5307.

The product of its (nonzero) digits is 172032, while the sum is 41.

The spelling of 72821428043 in words is "seventy-two billion, eight hundred twenty-one million, four hundred twenty-eight thousand, forty-three".