1641633354 has 12 divisors (see below), whose sum is σ = 3556872306. Its totient is φ = 547211112.

The previous prime is 1641633347. The next prime is 1641633359. The reversal of 1641633354 is 4533361461.

1641633354 is a `hidden beast` number, since 1 + 641 + 6 + 3 + 3 + 3 + 5 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 861716025 + 779917329 = 29355^2 + 27927^2 .

It is not an unprimeable number, because it can be changed into a prime (1641633359) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45600909 + ... + 45600944.

Almost surely, 2^1641633354 is an apocalyptic number.

1641633354 is an abundant number, since it is smaller than the sum of its proper divisors (1915238952).

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

1641633354 is a wasteful number, since it uses less digits than its factorization.

1641633354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91201861 (or 91201858 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 1641633354 is about 40517.0748450576. The cubic root of 1641633354 is about 1179.6650763531.

It can be divided in two parts, 16416 and 33354, that added together give a triangular number (49770 = T₃₁₅).

The spelling of 1641633354 in words is "one billion, six hundred forty-one million, six hundred thirty-three thousand, three hundred fifty-four".