72031548857 has 8 divisors (see below), whose sum is σ = 73818576480. Its totient is φ = 70249606560.

The previous prime is 72031548851. The next prime is 72031548859. The reversal of 72031548857 is 75884513027.

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 72031548857 - 2²⁰ = 72030500281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72031548851) 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, 1242644 + ... + 1299317.

It is an arithmetic number, because the mean of its divisors is an integer number (9227322060).

Almost surely, 2^72031548857 is an apocalyptic number.

It is an amenable number.

72031548857 is a deficient number, since it is larger than the sum of its proper divisors (1787027623).

72031548857 is a wasteful number, since it uses less digits than its factorization.

72031548857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542663.

The product of its (nonzero) digits is 1881600, while the sum is 50.

The spelling of 72031548857 in words is "seventy-two billion, thirty-one million, five hundred forty-eight thousand, eight hundred fifty-seven".