1641563004 has 24 divisors (see below), whose sum is σ = 3832733520. Its totient is φ = 546841984.

The previous prime is 1641563003. The next prime is 1641563017. The reversal of 1641563004 is 4003651461.

It is a super-2 number, since 2×1641563004² = 5389458192203008032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641563003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23049 + ... + 61760.

It is an arithmetic number, because the mean of its divisors is an integer number (159697230).

Almost surely, 2^1641563004 is an apocalyptic number.

It is an amenable number.

1641563004 is an abundant number, since it is smaller than the sum of its proper divisors (2191170516).

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

1641563004 is a wasteful number, since it uses less digits than its factorization.

1641563004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86429 (or 86427 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1641563004 is about 40516.2066832521. The cubic root of 1641563004 is about 1179.6482251231.

The spelling of 1641563004 in words is "one billion, six hundred forty-one million, five hundred sixty-three thousand, four".