1640027780292 has 48 divisors (see below), whose sum is σ = 4180819390272. Its totient is φ = 496239636480.

The previous prime is 1640027780219. The next prime is 1640027780333. The reversal of 1640027780292 is 2920877200461.

It is a super-2 number, since 2×1640027780292² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9141813 + ... + 9319484.

It is an arithmetic number, because the mean of its divisors is an integer number (87100403964).

Almost surely, 2^{1640027780292} is an apocalyptic number.

1640027780292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1640027780292 is an abundant number, since it is smaller than the sum of its proper divisors (2540791609980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1640027780292 is a wasteful number, since it uses less digits than its factorization.

1640027780292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18461988 (or 18461986 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 1640027780292 in words is "one trillion, six hundred forty billion, twenty-seven million, seven hundred eighty thousand, two hundred ninety-two".