7421456556 has 72 divisors (see below), whose sum is σ = 19942859664. Its totient is φ = 2318976000.

The previous prime is 7421456543. The next prime is 7421456611. The reversal of 7421456556 is 6556541247.

7421456556 is a `hidden beast` number, since 7 + 42 + 1 + 4 + 56 + 556 = 666.

It is a super-2 number, since 2×7421456556² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129456 + ... + 177768.

It is an arithmetic number, because the mean of its divisors is an integer number (276984162).

Almost surely, 2^7421456556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7421456556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9971429832).

7421456556 is an abundant number, since it is smaller than the sum of its proper divisors (12521403108).

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

7421456556 is a wasteful number, since it uses less digits than its factorization.

7421456556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48591 (or 48586 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The square root of 7421456556 is about 86147.8760968603. The cubic root of 7421456556 is about 1950.5767792823.

The spelling of 7421456556 in words is "seven billion, four hundred twenty-one million, four hundred fifty-six thousand, five hundred fifty-six".