1645841402 has 16 divisors (see below), whose sum is σ = 2483729952. Its totient is φ = 817946640.

The previous prime is 1645841377. The next prime is 1645841419. The reversal of 1645841402 is 2041485461.

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, 234833 + ... + 241739.

It is an arithmetic number, because the mean of its divisors is an integer number (155233122).

Almost surely, 2^1645841402 is an apocalyptic number.

1645841402 is a deficient number, since it is larger than the sum of its proper divisors (837888550).

1645841402 is a wasteful number, since it uses less digits than its factorization.

1645841402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7613.

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 1645841402 is about 40568.9709260661. The cubic root of 1645841402 is about 1180.6721732894.

The spelling of 1645841402 in words is "one billion, six hundred forty-five million, eight hundred forty-one thousand, four hundred two".