86939279640 has 320 divisors, whose sum is σ = 320970988800. Its totient is φ = 21008325888.

The previous prime is 86939279633. The next prime is 86939279747. The reversal of 86939279640 is 4697293968.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1385179 + ... + 1446581.

It is an arithmetic number, because the mean of its divisors is an integer number (1003034340).

Almost surely, 2^86939279640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86939279640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160485494400).

86939279640 is an abundant number, since it is smaller than the sum of its proper divisors (234031709160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86939279640 is a wasteful number, since it uses less digits than its factorization.

86939279640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61468 (or 61455 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 63.

The spelling of 86939279640 in words is "eighty-six billion, nine hundred thirty-nine million, two hundred seventy-nine thousand, six hundred forty".