1646746434 has 12 divisors (see below), whose sum is σ = 3567950646. Its totient is φ = 548915472.

The previous prime is 1646746421. The next prime is 1646746471. The reversal of 1646746434 is 4346476461.

It can be written as a sum of positive squares in only one way, i.e., 1119906225 + 526840209 = 33465^2 + 22953^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1646746434.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45742939 + ... + 45742974.

Almost surely, 2^1646746434 is an apocalyptic number.

1646746434 is an abundant number, since it is smaller than the sum of its proper divisors (1921204212).

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

1646746434 is a wasteful number, since it uses less digits than its factorization.

1646746434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91485921 (or 91485918 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 45.

The square root of 1646746434 is about 40580.1236321429. The cubic root of 1646746434 is about 1180.8885469723. Note that the first 3 decimals are identical.

The spelling of 1646746434 in words is "one billion, six hundred forty-six million, seven hundred forty-six thousand, four hundred thirty-four".