1640027780293 has 8 divisors (see below), whose sum is σ = 1878790777920. Its totient is φ = 1402383111360.

The previous prime is 1640027780219. The next prime is 1640027780333. The reversal of 1640027780293 is 3920877200461.

It is a happy number.

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

It is not a de Polignac number, because 1640027780293 - 2⁹ = 1640027779781 is a prime.

It is a super-2 number, since 2×1640027780293² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640027783293) 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, 279579028 + ... + 279584893.

It is an arithmetic number, because the mean of its divisors is an integer number (234848847240).

Almost surely, 2^{1640027780293} is an apocalyptic number.

It is an amenable number.

1640027780293 is a deficient number, since it is larger than the sum of its proper divisors (238762997627).

1640027780293 is an equidigital number, since it uses as much as digits as its factorization.

1640027780293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559164347.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 1640027780293 in words is "one trillion, six hundred forty billion, twenty-seven million, seven hundred eighty thousand, two hundred ninety-three".