86206981971 has 32 divisors (see below), whose sum is σ = 127257661440. Its totient is φ = 51472810400.

The previous prime is 86206981969. The next prime is 86206982009. The reversal of 86206981971 is 17918960268.

It is not a de Polignac number, because 86206981971 - 2¹ = 86206981969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86206981961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 939466 + ... + 1027136.

It is an arithmetic number, because the mean of its divisors is an integer number (3976801920).

Almost surely, 2^86206981971 is an apocalyptic number.

86206981971 is a deficient number, since it is larger than the sum of its proper divisors (41050679469).

86206981971 is a wasteful number, since it uses less digits than its factorization.

86206981971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88127.

The product of its (nonzero) digits is 2612736, while the sum is 57.

The spelling of 86206981971 in words is "eighty-six billion, two hundred six million, nine hundred eighty-one thousand, nine hundred seventy-one".