72780759 has 6 divisors (see below), whose sum is σ = 105127776. Its totient is φ = 48520500.

The previous prime is 72780731. The next prime is 72780761. The reversal of 72780759 is 95708727.

It is not a de Polignac number, because 72780759 - 2¹¹ = 72778711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72780959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4043367 + ... + 4043384.

It is an arithmetic number, because the mean of its divisors is an integer number (17521296).

Almost surely, 2^72780759 is an apocalyptic number.

72780759 is a deficient number, since it is larger than the sum of its proper divisors (32347017).

72780759 is a wasteful number, since it uses less digits than its factorization.

72780759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8086757 (or 8086754 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The square root of 72780759 is about 8531.1639885774. The cubic root of 72780759 is about 417.5151062458.

The spelling of 72780759 in words is "seventy-two million, seven hundred eighty thousand, seven hundred fifty-nine".