6403690373850 has 1440 divisors, whose sum is σ = 24469605648576. Its totient is φ = 1222934630400.

The previous prime is 6403690373827. The next prime is 6403690373897. The reversal of 6403690373850 is 583730963046.

6403690373850 is a `hidden beast` number, since 6 + 403 + 6 + 90 + 3 + 73 + 85 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 719 ways as a sum of consecutive naturals, for example, 1595734444 + ... + 1595738456.

Almost surely, 2^{6403690373850} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6403690373850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12234802824288).

6403690373850 is an abundant number, since it is smaller than the sum of its proper divisors (18065915274726).

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

6403690373850 is a wasteful number, since it uses less digits than its factorization.

6403690373850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122 (or 4101 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The spelling of 6403690373850 in words is "six trillion, four hundred three billion, six hundred ninety million, three hundred seventy-three thousand, eight hundred fifty".