72113475091 has 16 divisors (see below), whose sum is σ = 87547654656. Its totient is φ = 57986050176.

The previous prime is 72113475073. The next prime is 72113475107. The reversal of 72113475091 is 19057431127.

It is a happy number.

It is not a de Polignac number, because 72113475091 - 2⁵ = 72113475059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72113475001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 950431 + ... + 1023496.

It is an arithmetic number, because the mean of its divisors is an integer number (5471728416).

Almost surely, 2^72113475091 is an apocalyptic number.

72113475091 is a deficient number, since it is larger than the sum of its proper divisors (15434179565).

72113475091 is a wasteful number, since it uses less digits than its factorization.

72113475091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974258.

The product of its (nonzero) digits is 52920, while the sum is 40.

The spelling of 72113475091 in words is "seventy-two billion, one hundred thirteen million, four hundred seventy-five thousand, ninety-one".