72771543 has 24 divisors (see below), whose sum is σ = 119862288. Its totient is φ = 42147072.

The previous prime is 72771499. The next prime is 72771551. The reversal of 72771543 is 34517727.

It is not a de Polignac number, because 72771543 - 2⁹ = 72771031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72771498 and 72771507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72771143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16305 + ... + 20282.

It is an arithmetic number, because the mean of its divisors is an integer number (4994262).

Almost surely, 2^72771543 is an apocalyptic number.

72771543 is a deficient number, since it is larger than the sum of its proper divisors (47090745).

72771543 is a wasteful number, since it uses less digits than its factorization.

72771543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36623 (or 36620 counting only the distinct ones).

The product of its digits is 41160, while the sum is 36.

The square root of 72771543 is about 8530.6238341636. The cubic root of 72771543 is about 417.4974826243.

The spelling of 72771543 in words is "seventy-two million, seven hundred seventy-one thousand, five hundred forty-three".