72863870872 has 32 divisors (see below), whose sum is σ = 147174234480. Its totient is φ = 33619132800.

The previous prime is 72863870861. The next prime is 72863870873. The reversal of 72863870872 is 27807836827.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72863870873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237183 + ... + 449425.

Almost surely, 2^72863870872 is an apocalyptic number.

It is an amenable number.

72863870872 is an abundant number, since it is smaller than the sum of its proper divisors (74310363608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72863870872 is a wasteful number, since it uses less digits than its factorization.

72863870872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215563 (or 215559 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 58.

The spelling of 72863870872 in words is "seventy-two billion, eight hundred sixty-three million, eight hundred seventy thousand, eight hundred seventy-two".