19739464056164 has 6 divisors (see below), whose sum is σ = 34544062098294. Its totient is φ = 9869732028080.

The previous prime is 19739464056149. The next prime is 19739464056223. The reversal of 19739464056164 is 46165046493791.

It can be written as a sum of positive squares in only one way, i.e., 19582465843264 + 156998212900 = 4425208^2 + 396230^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19739464056164.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2467433007017 + ... + 2467433007024.

It is an arithmetic number, because the mean of its divisors is an integer number (5757343683049).

Almost surely, 2^{19739464056164} is an apocalyptic number.

It is an amenable number.

19739464056164 is a deficient number, since it is larger than the sum of its proper divisors (14804598042130).

19739464056164 is a wasteful number, since it uses less digits than its factorization.

19739464056164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934866014045 (or 4934866014043 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 65.

The spelling of 19739464056164 in words is "nineteen trillion, seven hundred thirty-nine billion, four hundred sixty-four million, fifty-six thousand, one hundred sixty-four".