1640017892887 has 8 divisors (see below), whose sum is σ = 1827176608512. Its totient is φ = 1459203540600.

The previous prime is 1640017892867. The next prime is 1640017892893. The reversal of 1640017892887 is 7882987100461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1640017892887 - 2⁷ = 1640017892759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640017892867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1586090289 + ... + 1586091322.

It is an arithmetic number, because the mean of its divisors is an integer number (228397076064).

Almost surely, 2^{1640017892887} is an apocalyptic number.

1640017892887 is a deficient number, since it is larger than the sum of its proper divisors (187158715625).

1640017892887 is a wasteful number, since it uses less digits than its factorization.

1640017892887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172181669.

The product of its (nonzero) digits is 10838016, while the sum is 61.

The spelling of 1640017892887 in words is "one trillion, six hundred forty billion, seventeen million, eight hundred ninety-two thousand, eight hundred eighty-seven".