1640838338116 has 6 divisors (see below), whose sum is σ = 2871467091710. Its totient is φ = 820419169056.

The previous prime is 1640838338023. The next prime is 1640838338149. The reversal of 1640838338116 is 6118338380461.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1536409830400 + 104428507716 = 1239520^2 + 323154^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205104792261 + ... + 205104792268.

Almost surely, 2^{1640838338116} is an apocalyptic number.

It is an amenable number.

1640838338116 is a deficient number, since it is larger than the sum of its proper divisors (1230628753594).

1640838338116 is a wasteful number, since it uses less digits than its factorization.

1640838338116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410209584533 (or 410209584531 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 1640838338116 in words is "one trillion, six hundred forty billion, eight hundred thirty-eight million, three hundred thirty-eight thousand, one hundred sixteen".