6420863950 has 12 divisors (see below), whose sum is σ = 11942807040. Its totient is φ = 2568345560.

The previous prime is 6420863941. The next prime is 6420863951. The reversal of 6420863950 is 593680246.

It is a junction number, because it is equal to n+sod(n) for n = 6420863897 and 6420863906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420863951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64208590 + ... + 64208689.

It is an arithmetic number, because the mean of its divisors is an integer number (995233920).

Almost surely, 2^6420863950 is an apocalyptic number.

6420863950 is a deficient number, since it is larger than the sum of its proper divisors (5521943090).

6420863950 is a wasteful number, since it uses less digits than its factorization.

6420863950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128417291 (or 128417286 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 6420863950 is about 80130.2935848859. The cubic root of 6420863950 is about 1858.6508841313.

The spelling of 6420863950 in words is "six billion, four hundred twenty million, eight hundred sixty-three thousand, nine hundred fifty".