864201402138 has 32 divisors (see below), whose sum is σ = 1825280303616. Its totient is φ = 272222683568.

The previous prime is 864201402133. The next prime is 864201402167. The reversal of 864201402138 is 831204102468.

It is a junction number, because it is equal to n+sod(n) for n = 864201402096 and 864201402105.

It is not an unprimeable number, because it can be changed into a prime (864201402131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37713420 + ... + 37736327.

It is an arithmetic number, because the mean of its divisors is an integer number (57040009488).

Almost surely, 2^864201402138 is an apocalyptic number.

864201402138 is an abundant number, since it is smaller than the sum of its proper divisors (961078901478).

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

864201402138 is a wasteful number, since it uses less digits than its factorization.

864201402138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75449858.

The product of its (nonzero) digits is 73728, while the sum is 39.

The spelling of 864201402138 in words is "eight hundred sixty-four billion, two hundred one million, four hundred two thousand, one hundred thirty-eight".