72075640187 has 6 divisors (see below), whose sum is σ = 74646710268. Its totient is φ = 69590272472.

The previous prime is 72075640157. The next prime is 72075640199. The reversal of 72075640187 is 78104657027.

It is a happy number.

It is not a de Polignac number, because 72075640187 - 2⁶ = 72075640123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72075640157) 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 5 ways as a sum of consecutive naturals, for example, 42850313 + ... + 42851994.

It is an arithmetic number, because the mean of its divisors is an integer number (12441118378).

Almost surely, 2^72075640187 is an apocalyptic number.

72075640187 is a deficient number, since it is larger than the sum of its proper divisors (2571070081).

72075640187 is an equidigital number, since it uses as much as digits as its factorization.

72075640187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85702365 (or 85702336 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 47.

The spelling of 72075640187 in words is "seventy-two billion, seventy-five million, six hundred forty thousand, one hundred eighty-seven".