1640680290143 has 4 divisors (see below), whose sum is σ = 1642431283920. Its totient is φ = 1638929296368.

The previous prime is 1640680290121. The next prime is 1640680290173. The reversal of 1640680290143 is 3410920860461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1640680290143 - 2⁶ = 1640680290079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1640680290094 and 1640680290103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640680290103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875495483 + ... + 875497356.

It is an arithmetic number, because the mean of its divisors is an integer number (410607820980).

Almost surely, 2^{1640680290143} is an apocalyptic number.

1640680290143 is a deficient number, since it is larger than the sum of its proper divisors (1750993777).

1640680290143 is an equidigital number, since it uses as much as digits as its factorization.

1640680290143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750993776.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 1640680290143 in words is "one trillion, six hundred forty billion, six hundred eighty million, two hundred ninety thousand, one hundred forty-three".