16640202340 has 12 divisors (see below), whose sum is σ = 34944424956. Its totient is φ = 6656080928.

The previous prime is 16640202329. The next prime is 16640202409. The reversal of 16640202340 is 4320204661.

It can be written as a sum of positive squares in 2 ways, for example, as 7290085924 + 9350116416 = 85382^2 + 96696^2 .

It is a super-2 number, since 2×16640202340² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16640202299 and 16640202308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416005039 + ... + 416005078.

It is an arithmetic number, because the mean of its divisors is an integer number (2912035413).

Almost surely, 2^16640202340 is an apocalyptic number.

16640202340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16640202340 is an abundant number, since it is smaller than the sum of its proper divisors (18304222616).

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

16640202340 is a wasteful number, since it uses less digits than its factorization.

16640202340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832010126 (or 832010124 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 16640202340 in words is "sixteen billion, six hundred forty million, two hundred two thousand, three hundred forty".