72821962578 has 32 divisors (see below), whose sum is σ = 152657842176. Its totient is φ = 23114467728.

The previous prime is 72821962561. The next prime is 72821962579. The reversal of 72821962578 is 87526912827.

It is not an unprimeable number, because it can be changed into a prime (72821962579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1152400 + ... + 1213947.

It is an arithmetic number, because the mean of its divisors is an integer number (4770557568).

Almost surely, 2^72821962578 is an apocalyptic number.

72821962578 is an abundant number, since it is smaller than the sum of its proper divisors (79835879598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72821962578 is a wasteful number, since it uses less digits than its factorization.

72821962578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366598.

The product of its digits is 6773760, while the sum is 57.

The spelling of 72821962578 in words is "seventy-two billion, eight hundred twenty-one million, nine hundred sixty-two thousand, five hundred seventy-eight".