1641463613 has 4 divisors (see below), whose sum is σ = 1641545148. Its totient is φ = 1641382080.

The previous prime is 1641463601. The next prime is 1641463669. The reversal of 1641463613 is 3163641461.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 385611769 + 1255851844 = 19637^2 + 35438^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641463613 - 2⁸ = 1641463357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641363613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13595 + ... + 58887.

It is an arithmetic number, because the mean of its divisors is an integer number (410386287).

Almost surely, 2^1641463613 is an apocalyptic number.

It is an amenable number.

1641463613 is a deficient number, since it is larger than the sum of its proper divisors (81535).

1641463613 is an equidigital number, since it uses as much as digits as its factorization.

1641463613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81534.

The product of its digits is 31104, while the sum is 35.

The square root of 1641463613 is about 40514.9801061286. The cubic root of 1641463613 is about 1179.6244167602.

The spelling of 1641463613 in words is "one billion, six hundred forty-one million, four hundred sixty-three thousand, six hundred thirteen".