1641653040 has 40 divisors (see below), whose sum is σ = 5089125168. Its totient is φ = 437774080.

The previous prime is 1641653017. The next prime is 1641653051. The reversal of 1641653040 is 403561461.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1641652989 and 1641653007.

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, 3419871 + ... + 3420350.

Almost surely, 2^1641653040 is an apocalyptic number.

1641653040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641653040 is an abundant number, since it is smaller than the sum of its proper divisors (3447472128).

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

1641653040 is a wasteful number, since it uses less digits than its factorization.

1641653040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840237 (or 6840231 counting only the distinct ones).

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

The square root of 1641653040 is about 40517.3177789448. The cubic root of 1641653040 is about 1179.6697917369.

The spelling of 1641653040 in words is "one billion, six hundred forty-one million, six hundred fifty-three thousand, forty".