1642659490 has 16 divisors (see below), whose sum is σ = 2957886720. Its totient is φ = 656819440.

The previous prime is 1642659467. The next prime is 1642659503. The reversal of 1642659490 is 949562461.

It is a self number, because there is not a number n which added to its sum of digits gives 1642659490.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 946 + ... + 57325.

It is an arithmetic number, because the mean of its divisors is an integer number (184867920).

Almost surely, 2^1642659490 is an apocalyptic number.

1642659490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1642659490 is a deficient number, since it is larger than the sum of its proper divisors (1315227230).

1642659490 is a wasteful number, since it uses less digits than its factorization.

1642659490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61097.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 1642659490 is about 40529.7358738001. The cubic root of 1642659490 is about 1179.9108162991.

It can be divided in two parts, 164265 and 9490, that added together give a triangular number (173755 = T₅₈₉).

The spelling of 1642659490 in words is "one billion, six hundred forty-two million, six hundred fifty-nine thousand, four hundred ninety".