6432401538 has 16 divisors (see below), whose sum is σ = 14294225760. Its totient is φ = 2144133828.

The previous prime is 6432401533. The next prime is 6432401539. The reversal of 6432401538 is 8351042346.

6432401538 is a `hidden beast` number, since 643 + 2 + 4 + 0 + 1 + 5 + 3 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (6432401533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59559220 + ... + 59559327.

It is an arithmetic number, because the mean of its divisors is an integer number (893389110).

Almost surely, 2^6432401538 is an apocalyptic number.

6432401538 is an abundant number, since it is smaller than the sum of its proper divisors (7861824222).

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

6432401538 is a wasteful number, since it uses less digits than its factorization.

6432401538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119118558 (or 119118552 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 6432401538 is about 80202.2539458836. The cubic root of 6432401538 is about 1859.7634818923.

The spelling of 6432401538 in words is "six billion, four hundred thirty-two million, four hundred one thousand, five hundred thirty-eight".