1641819460 has 24 divisors (see below), whose sum is σ = 3448926936. Its totient is φ = 656517120.

The previous prime is 1641819433. The next prime is 1641819461. The reversal of 1641819460 is 649181461.

It can be written as a sum of positive squares in 4 ways, for example, as 20629764 + 1621189696 = 4542^2 + 40264^2 .

It is a super-2 number, since 2×1641819460² = 5391142278469383200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1641819461) 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, 60900 + ... + 83620.

It is an arithmetic number, because the mean of its divisors is an integer number (143705289).

Almost surely, 2^1641819460 is an apocalyptic number.

1641819460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641819460 is an abundant number, since it is smaller than the sum of its proper divisors (1807107476).

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

1641819460 is a wasteful number, since it uses less digits than its factorization.

1641819460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26343 (or 26341 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1641819460 is about 40519.3714166447. The cubic root of 1641819460 is about 1179.7096527811.

The spelling of 1641819460 in words is "one billion, six hundred forty-one million, eight hundred nineteen thousand, four hundred sixty".