1609891142 has 16 divisors (see below), whose sum is σ = 2456551680. Its totient is φ = 791096328.

The previous prime is 1609891139. The next prime is 1609891183. The reversal of 1609891142 is 2411989061.

It is a self number, because there is not a number n which added to its sum of digits gives 1609891142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45143 + ... + 72509.

It is an arithmetic number, because the mean of its divisors is an integer number (153534480).

Almost surely, 2^1609891142 is an apocalyptic number.

1609891142 is a deficient number, since it is larger than the sum of its proper divisors (846660538).

1609891142 is a wasteful number, since it uses less digits than its factorization.

1609891142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27875.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 1609891142 is about 40123.4487799840. The cubic root of 1609891142 is about 1172.0123019944.

The spelling of 1609891142 in words is "one billion, six hundred nine million, eight hundred ninety-one thousand, one hundred forty-two".