72646545 has 8 divisors (see below), whose sum is σ = 116234496. Its totient is φ = 38744816.

The previous prime is 72646531. The next prime is 72646603. The reversal of 72646545 is 54564627.

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

It is a cyclic number.

It is not a de Polignac number, because 72646545 - 2⁴ = 72646529 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2421537 + ... + 2421566.

It is an arithmetic number, because the mean of its divisors is an integer number (14529312).

Almost surely, 2^72646545 is an apocalyptic number.

It is an amenable number.

72646545 is a deficient number, since it is larger than the sum of its proper divisors (43587951).

72646545 is a wasteful number, since it uses less digits than its factorization.

72646545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4843111.

The product of its digits is 201600, while the sum is 39.

The square root of 72646545 is about 8523.2942575040. The cubic root of 72646545 is about 417.2583036977.

The spelling of 72646545 in words is "seventy-two million, six hundred forty-six thousand, five hundred forty-five".