72335420491 has 4 divisors (see below), whose sum is σ = 74668821184. Its totient is φ = 70002019800.

The previous prime is 72335420459. The next prime is 72335420497. The reversal of 72335420491 is 19402453327.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72335420491 - 2⁵ = 72335420459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72335420497) 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 3 ways as a sum of consecutive naturals, for example, 1166700300 + ... + 1166700361.

It is an arithmetic number, because the mean of its divisors is an integer number (18667205296).

Almost surely, 2^72335420491 is an apocalyptic number.

72335420491 is a deficient number, since it is larger than the sum of its proper divisors (2333400693).

72335420491 is a wasteful number, since it uses less digits than its factorization.

72335420491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333400692.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 72335420491 in words is "seventy-two billion, three hundred thirty-five million, four hundred twenty thousand, four hundred ninety-one".