1641513040 has 40 divisors (see below), whose sum is σ = 3868812648. Its totient is φ = 647608320.

The previous prime is 1641513017. The next prime is 1641513053. The reversal of 1641513040 is 403151461.

It can be written as a sum of positive squares in 4 ways, for example, as 205406224 + 1436106816 = 14332^2 + 37896^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1641512996 and 1641513014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134701 + ... + 146380.

Almost surely, 2^1641513040 is an apocalyptic number.

1641513040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641513040 is an abundant number, since it is smaller than the sum of its proper divisors (2227299608).

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

1641513040 is a wasteful number, since it uses less digits than its factorization.

1641513040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281167 (or 281161 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1641513040 is about 40515.5900857929. The cubic root of 1641513040 is about 1179.6362567446.

The spelling of 1641513040 in words is "one billion, six hundred forty-one million, five hundred thirteen thousand, forty".