1641465520 has 40 divisors (see below), whose sum is σ = 3838499856. Its totient is φ = 652785408.

The previous prime is 1641465509. The next prime is 1641465547. The reversal of 1641465520 is 255641461.

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

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, 45462 + ... + 73141.

Almost surely, 2^1641465520 is an apocalyptic number.

1641465520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641465520 is an abundant number, since it is smaller than the sum of its proper divisors (2197034336).

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

1641465520 is a wasteful number, since it uses less digits than its factorization.

1641465520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118789 (or 118783 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 1641465520 is about 40515.0036406268. The cubic root of 1641465520 is about 1179.6248735767.

The spelling of 1641465520 in words is "one billion, six hundred forty-one million, four hundred sixty-five thousand, five hundred twenty".