1645846674 has 16 divisors (see below), whose sum is σ = 3331353312. Its totient is φ = 542005568.

The previous prime is 1645846661. The next prime is 1645846711. The reversal of 1645846674 is 4766485461.

It is a super-2 number, since 2×1645846674² = 5417622548633724552, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1651959 + ... + 1652954.

It is an arithmetic number, because the mean of its divisors is an integer number (208209582).

Almost surely, 2^1645846674 is an apocalyptic number.

1645846674 is an abundant number, since it is smaller than the sum of its proper divisors (1685506638).

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

1645846674 is a wasteful number, since it uses less digits than its factorization.

1645846674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305001.

The product of its digits is 3870720, while the sum is 51.

The square root of 1645846674 is about 40569.0359017811. The cubic root of 1645846674 is about 1180.6734339408.

The spelling of 1645846674 in words is "one billion, six hundred forty-five million, eight hundred forty-six thousand, six hundred seventy-four".