6426518220 has 72 divisors (see below), whose sum is σ = 19505172960. Its totient is φ = 1712736000.

The previous prime is 6426518201. The next prime is 6426518239. The reversal of 6426518220 is 228156246.

It is a happy number.

6426518220 is a `hidden beast` number, since 6 + 426 + 5 + 1 + 8 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (6426518201) and next prime (6426518239).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328720 + ... + 347720.

It is an arithmetic number, because the mean of its divisors is an integer number (270905180).

Almost surely, 2^6426518220 is an apocalyptic number.

6426518220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6426518220 is an abundant number, since it is smaller than the sum of its proper divisors (13078654740).

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

6426518220 is a wasteful number, since it uses less digits than its factorization.

6426518220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20895 (or 20890 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 6426518220 is about 80165.5675461728. The cubic root of 6426518220 is about 1859.1963055709.

The spelling of 6426518220 in words is "six billion, four hundred twenty-six million, five hundred eighteen thousand, two hundred twenty".