6421059993603 has 32 divisors (see below), whose sum is σ = 9130923334656. Its totient is φ = 4004658889088.

The previous prime is 6421059993553. The next prime is 6421059993611. The reversal of 6421059993603 is 3063999501246.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6421059993603 - 2⁹ = 6421059993091 is a prime.

It is a super-2 number, since 2×6421059993603² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6421059993653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1610175 + ... + 3928712.

It is an arithmetic number, because the mean of its divisors is an integer number (285341354208).

Almost surely, 2^{6421059993603} is an apocalyptic number.

6421059993603 is a deficient number, since it is larger than the sum of its proper divisors (2709863341053).

6421059993603 is a wasteful number, since it uses less digits than its factorization.

6421059993603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5539283.

The product of its (nonzero) digits is 9447840, while the sum is 57.

The spelling of 6421059993603 in words is "six trillion, four hundred twenty-one billion, fifty-nine million, nine hundred ninety-three thousand, six hundred three".