7191745487 has 16 divisors (see below), whose sum is σ = 7423870080. Its totient is φ = 6963840000.

The previous prime is 7191745417. The next prime is 7191745511. The reversal of 7191745487 is 7845471917.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7191745487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7191745417) 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, 1795487 + ... + 1799487.

It is an arithmetic number, because the mean of its divisors is an integer number (463991880).

Almost surely, 2^7191745487 is an apocalyptic number.

7191745487 is a deficient number, since it is larger than the sum of its proper divisors (232124593).

7191745487 is a wasteful number, since it uses less digits than its factorization.

7191745487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4514.

The product of its digits is 1975680, while the sum is 53.

The square root of 7191745487 is about 84804.1596090663. The cubic root of 7191745487 is about 1930.2405569664.

The spelling of 7191745487 in words is "seven billion, one hundred ninety-one million, seven hundred forty-five thousand, four hundred eighty-seven".