72769155 has 8 divisors (see below), whose sum is σ = 116430672. Its totient is φ = 38810208.

The previous prime is 72769139. The next prime is 72769181. The reversal of 72769155 is 55196727.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72769155 - 2⁴ = 72769139 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2425624 + ... + 2425653.

It is an arithmetic number, because the mean of its divisors is an integer number (14553834).

Almost surely, 2^72769155 is an apocalyptic number.

72769155 is a deficient number, since it is larger than the sum of its proper divisors (43661517).

72769155 is a wasteful number, since it uses less digits than its factorization.

72769155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4851285.

The product of its digits is 132300, while the sum is 42.

The square root of 72769155 is about 8530.4838666983. The cubic root of 72769155 is about 417.4929158443.

The spelling of 72769155 in words is "seventy-two million, seven hundred sixty-nine thousand, one hundred fifty-five".