72075640123 has 2 divisors, whose sum is σ = 72075640124. Its totient is φ = 72075640122.

The previous prime is 72075640097. The next prime is 72075640157. The reversal of 72075640123 is 32104657027.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72075640123 - 2¹³ = 72075631931 is a prime.

It is not a weakly prime, because it can be changed into another prime (72075640423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36037820061 + 36037820062.

It is an arithmetic number, because the mean of its divisors is an integer number (36037820062).

Almost surely, 2^72075640123 is an apocalyptic number.

72075640123 is a deficient number, since it is larger than the sum of its proper divisors (1).

72075640123 is an equidigital number, since it uses as much as digits as its factorization.

72075640123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 72075640123 in words is "seventy-two billion, seventy-five million, six hundred forty thousand, one hundred twenty-three".