6556494420 has 288 divisors, whose sum is σ = 23596984320. Its totient is φ = 1441981440.

The previous prime is 6556494403. The next prime is 6556494449. The reversal of 6556494420 is 244946556.

6556494420 is a `hidden beast` number, since 6 + 556 + 4 + 94 + 4 + 2 + 0 = 666.

It is a super-2 number, since 2×6556494420² = 85975238158982272800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8944374 + ... + 8945106.

Almost surely, 2^6556494420 is an apocalyptic number.

6556494420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6556494420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11798492160).

6556494420 is an abundant number, since it is smaller than the sum of its proper divisors (17040489900).

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

6556494420 is a wasteful number, since it uses less digits than its factorization.

6556494420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015 (or 1010 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The square root of 6556494420 is about 80972.1830013246. The cubic root of 6556494420 is about 1871.6468111077.

The spelling of 6556494420 in words is "six billion, five hundred fifty-six million, four hundred ninety-four thousand, four hundred twenty".