72077755 has 16 divisors (see below), whose sum is σ = 87867360. Its totient is φ = 56754432.

The previous prime is 72077749. The next prime is 72077833. The reversal of 72077755 is 55777027.

It is a cyclic number.

It is not a de Polignac number, because 72077755 - 2¹⁹ = 71553467 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94837 + ... + 95593.

It is an arithmetic number, because the mean of its divisors is an integer number (5491710).

Almost surely, 2^72077755 is an apocalyptic number.

72077755 is a deficient number, since it is larger than the sum of its proper divisors (15789605).

72077755 is a wasteful number, since it uses less digits than its factorization.

72077755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038.

The product of its (nonzero) digits is 120050, while the sum is 40.

The square root of 72077755 is about 8489.8618952254. The cubic root of 72077755 is about 416.1664671391.

The spelling of 72077755 in words is "seventy-two million, seventy-seven thousand, seven hundred fifty-five".