6433297920 has 480 divisors, whose sum is σ = 25761333312. Its totient is φ = 1453326336.

The previous prime is 6433297877. The next prime is 6433297931. The reversal of 6433297920 is 297923346.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18224464 + ... + 18224816.

Almost surely, 2^6433297920 is an apocalyptic number.

6433297920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6433297920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12880666656).

6433297920 is an abundant number, since it is smaller than the sum of its proper divisors (19328035392).

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

6433297920 is a wasteful number, since it uses less digits than its factorization.

6433297920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The square root of 6433297920 is about 80207.8420106164. The cubic root of 6433297920 is about 1859.8498664807.

It can be divided in two parts, 643329 and 7920, that added together give a square (651249 = 807²).

The spelling of 6433297920 in words is "six billion, four hundred thirty-three million, two hundred ninety-seven thousand, nine hundred twenty".