86721217253 has 16 divisors (see below), whose sum is σ = 94901021952. Its totient is φ = 78590952000.

The previous prime is 86721217223. The next prime is 86721217279. The reversal of 86721217253 is 35271212768.

It is a de Polignac number, because none of the positive numbers 2^k-86721217253 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86721217223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14895083 + ... + 14900903.

It is an arithmetic number, because the mean of its divisors is an integer number (5931313872).

Almost surely, 2^86721217253 is an apocalyptic number.

It is an amenable number.

86721217253 is a deficient number, since it is larger than the sum of its proper divisors (8179804699).

86721217253 is a wasteful number, since it uses less digits than its factorization.

86721217253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9836.

The product of its digits is 282240, while the sum is 44.

The spelling of 86721217253 in words is "eighty-six billion, seven hundred twenty-one million, two hundred seventeen thousand, two hundred fifty-three".