6403761732420 has 288 divisors, whose sum is σ = 22835510705280. Its totient is φ = 1493346585600.

The previous prime is 6403761732419. The next prime is 6403761732443. The reversal of 6403761732420 is 242371673046.

6403761732420 is a `hidden beast` number, since 6 + 4 + 0 + 3 + 7 + 617 + 3 + 2 + 4 + 20 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1466881 + ... + 3867720.

Almost surely, 2^{6403761732420} is an apocalyptic number.

6403761732420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6403761732420 is an abundant number, since it is smaller than the sum of its proper divisors (16431748972860).

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

6403761732420 is a wasteful number, since it uses less digits than its factorization.

6403761732420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5334657 (or 5334643 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 45.

The spelling of 6403761732420 in words is "six trillion, four hundred three billion, seven hundred sixty-one million, seven hundred thirty-two thousand, four hundred twenty".