1641234381 has 16 divisors (see below), whose sum is σ = 2280312000. Its totient is φ = 1048707968.

The previous prime is 1641234311. The next prime is 1641234403. The reversal of 1641234381 is 1834321461.

It is a cyclic number.

It is not a de Polignac number, because 1641234381 - 2¹⁷ = 1641103309 is a prime.

It is a super-2 number, since 2×1641234381² = 5387300586752906322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641234311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56931 + ... + 80768.

It is an arithmetic number, because the mean of its divisors is an integer number (142519500).

Almost surely, 2^1641234381 is an apocalyptic number.

It is an amenable number.

1641234381 is a deficient number, since it is larger than the sum of its proper divisors (639077619).

1641234381 is a wasteful number, since it uses less digits than its factorization.

1641234381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137868.

The product of its digits is 13824, while the sum is 33.

The square root of 1641234381 is about 40512.1510290431. The cubic root of 1641234381 is about 1179.5695023024.

The spelling of 1641234381 in words is "one billion, six hundred forty-one million, two hundred thirty-four thousand, three hundred eighty-one".