72501563 has 4 divisors (see below), whose sum is σ = 72693240. Its totient is φ = 72309888.

The previous prime is 72501553. The next prime is 72501577. The reversal of 72501563 is 36510527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72501563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72501503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95270 + ... + 96027.

It is an arithmetic number, because the mean of its divisors is an integer number (18173310).

Almost surely, 2^72501563 is an apocalyptic number.

72501563 is a deficient number, since it is larger than the sum of its proper divisors (191677).

72501563 is a wasteful number, since it uses less digits than its factorization.

72501563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191676.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 72501563 is about 8514.7849649888. The cubic root of 72501563 is about 416.9805422355.

The spelling of 72501563 in words is "seventy-two million, five hundred one thousand, five hundred sixty-three".