86743221957 has 24 divisors (see below), whose sum is σ = 143383406400. Its totient is φ = 49502393280.

The previous prime is 86743221863. The next prime is 86743221977. The reversal of 86743221957 is 75912234768.

It is a happy number.

It is not a de Polignac number, because 86743221957 - 2¹¹ = 86743219909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86743221977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 856707 + ... + 952592.

It is an arithmetic number, because the mean of its divisors is an integer number (5974308600).

Almost surely, 2^86743221957 is an apocalyptic number.

It is an amenable number.

86743221957 is a deficient number, since it is larger than the sum of its proper divisors (56640184443).

86743221957 is a wasteful number, since it uses less digits than its factorization.

86743221957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810073 (or 1810070 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The spelling of 86743221957 in words is "eighty-six billion, seven hundred forty-three million, two hundred twenty-one thousand, nine hundred fifty-seven".