1601063640 has 96 divisors (see below), whose sum is σ = 5676512400. Its totient is φ = 388135680.

The previous prime is 1601063627. The next prime is 1601063641. The reversal of 1601063640 is 463601061.

1601063640 is a `hidden beast` number, since 1 + 6 + 0 + 10 + 6 + 3 + 640 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601063641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198195 + ... + 206114.

Almost surely, 2^1601063640 is an apocalyptic number.

1601063640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1601063640 is an abundant number, since it is smaller than the sum of its proper divisors (4075448760).

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

1601063640 is a wasteful number, since it uses less digits than its factorization.

1601063640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404337 (or 404330 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1601063640 is about 40013.2932911051. The cubic root of 1601063640 is about 1169.8662130609.

The spelling of 1601063640 in words is "one billion, six hundred one million, sixty-three thousand, six hundred forty".