1685319642 has 16 divisors (see below), whose sum is σ = 3745154880. Its totient is φ = 561773196.

The previous prime is 1685319631. The next prime is 1685319661. The reversal of 1685319642 is 2469135861.

It is a super-2 number, since 2×1685319642² = 5680604591422016328, which contains 22 as substring.

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, 15604758 + ... + 15604865.

It is an arithmetic number, because the mean of its divisors is an integer number (234072180).

Almost surely, 2^1685319642 is an apocalyptic number.

1685319642 is an abundant number, since it is smaller than the sum of its proper divisors (2059835238).

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

1685319642 is a wasteful number, since it uses less digits than its factorization.

1685319642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31209634 (or 31209628 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 1685319642 is about 41052.6447625485. The cubic root of 1685319642 is about 1190.0378120415.

The spelling of 1685319642 in words is "one billion, six hundred eighty-five million, three hundred nineteen thousand, six hundred forty-two".