6420799208756 has 12 divisors (see below), whose sum is σ = 11236434127968. Its totient is φ = 3210389457912.

The previous prime is 6420799208671. The next prime is 6420799208767. The reversal of 6420799208756 is 6578029970246.

It is a junction number, because it is equal to n+sod(n) for n = 6420799208692 and 6420799208701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010816 + ... + 3723351.

It is an arithmetic number, because the mean of its divisors is an integer number (936369510664).

Almost surely, 2^{6420799208756} is an apocalyptic number.

It is an amenable number.

6420799208756 is a deficient number, since it is larger than the sum of its proper divisors (4815634919212).

6420799208756 is a wasteful number, since it uses less digits than its factorization.

6420799208756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5073238 (or 5073236 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 65.

The spelling of 6420799208756 in words is "six trillion, four hundred twenty billion, seven hundred ninety-nine million, two hundred eight thousand, seven hundred fifty-six".