1640246384871 has 48 divisors (see below), whose sum is σ = 2555010398304. Its totient is φ = 1010297014272.

The previous prime is 1640246384783. The next prime is 1640246384873. The reversal of 1640246384871 is 1784836420461.

1640246384871 is a `hidden beast` number, since 16 + 4 + 0 + 246 + 384 + 8 + 7 + 1 = 666.

It is not a de Polignac number, because 1640246384871 - 2¹⁰ = 1640246383847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640246384873) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1582395 + ... + 2405091.

It is an arithmetic number, because the mean of its divisors is an integer number (53229383298).

Almost surely, 2^{1640246384871} is an apocalyptic number.

1640246384871 is a deficient number, since it is larger than the sum of its proper divisors (914764013433).

1640246384871 is a wasteful number, since it uses less digits than its factorization.

1640246384871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822960 (or 822957 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 1640246384871 in words is "one trillion, six hundred forty billion, two hundred forty-six million, three hundred eighty-four thousand, eight hundred seventy-one".