83986531951 has 8 divisors (see below), whose sum is σ = 95986833824. Its totient is φ = 71986786560.

The previous prime is 83986531949. The next prime is 83986531957. The reversal of 83986531951 is 15913568938.

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 83986531951 - 2¹ = 83986531949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83986531957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261031 + ... + 485911.

It is an arithmetic number, because the mean of its divisors is an integer number (11998354228).

Almost surely, 2^83986531951 is an apocalyptic number.

83986531951 is a deficient number, since it is larger than the sum of its proper divisors (12000301873).

83986531951 is a wasteful number, since it uses less digits than its factorization.

83986531951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278241.

The product of its digits is 6998400, while the sum is 58.

The spelling of 83986531951 in words is "eighty-three billion, nine hundred eighty-six million, five hundred thirty-one thousand, nine hundred fifty-one".