86641245251 has 4 divisors (see below), whose sum is σ = 94517722104. Its totient is φ = 78764768400.

The previous prime is 86641245167. The next prime is 86641245269. The reversal of 86641245251 is 15254214668.

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

It is a cyclic number.

It is not a de Polignac number, because 86641245251 - 2¹⁴ = 86641228867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86641245851) 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, 3938238410 + ... + 3938238431.

It is an arithmetic number, because the mean of its divisors is an integer number (23629430526).

Almost surely, 2^86641245251 is an apocalyptic number.

86641245251 is a deficient number, since it is larger than the sum of its proper divisors (7876476853).

86641245251 is a wasteful number, since it uses less digits than its factorization.

86641245251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7876476852.

The product of its digits is 460800, while the sum is 44.

The spelling of 86641245251 in words is "eighty-six billion, six hundred forty-one million, two hundred forty-five thousand, two hundred fifty-one".