1641463856 has 60 divisors (see below), whose sum is σ = 3298492008. Its totient is φ = 791271936.

The previous prime is 1641463853. The next prime is 1641463891. The reversal of 1641463856 is 6583641461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641463853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3000575 + ... + 3001121.

Almost surely, 2^1641463856 is an apocalyptic number.

1641463856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1641463856 is an abundant number, since it is smaller than the sum of its proper divisors (1657028152).

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

1641463856 is a wasteful number, since it uses less digits than its factorization.

1641463856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 723 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The square root of 1641463856 is about 40514.9831050193. The cubic root of 1641463856 is about 1179.6244749702.

The spelling of 1641463856 in words is "one billion, six hundred forty-one million, four hundred sixty-three thousand, eight hundred fifty-six".