86921503851 has 32 divisors (see below), whose sum is σ = 142666191360. Its totient is φ = 45840420864.

The previous prime is 86921503847. The next prime is 86921503859. The reversal of 86921503851 is 15830512968.

It is a happy number.

It is not a de Polignac number, because 86921503851 - 2² = 86921503847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86921503851.

It is not an unprimeable number, because it can be changed into a prime (86921503859) 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, 1667755 + ... + 1719083.

It is an arithmetic number, because the mean of its divisors is an integer number (4458318480).

Almost surely, 2^86921503851 is an apocalyptic number.

86921503851 is a deficient number, since it is larger than the sum of its proper divisors (55744687509).

86921503851 is a wasteful number, since it uses less digits than its factorization.

86921503851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57555.

The product of its (nonzero) digits is 518400, while the sum is 48.

The spelling of 86921503851 in words is "eighty-six billion, nine hundred twenty-one million, five hundred three thousand, eight hundred fifty-one".