72049155 has 8 divisors (see below), whose sum is σ = 115278672. Its totient is φ = 38426208.

The previous prime is 72049151. The next prime is 72049163. The reversal of 72049155 is 55194027.

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

It is not a de Polignac number, because 72049155 - 2² = 72049151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72049151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2401624 + ... + 2401653.

It is an arithmetic number, because the mean of its divisors is an integer number (14409834).

Almost surely, 2^72049155 is an apocalyptic number.

72049155 is a deficient number, since it is larger than the sum of its proper divisors (43229517).

72049155 is a wasteful number, since it uses less digits than its factorization.

72049155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4803285.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 72049155 is about 8488.1773661959. The cubic root of 72049155 is about 416.1114157779. Note that the first 3 decimals are identical.

The spelling of 72049155 in words is "seventy-two million, forty-nine thousand, one hundred fifty-five".