4257556842 has 64 divisors (see below), whose sum is σ = 10669824000. Its totient is φ = 1100278080.

The previous prime is 4257556829. The next prime is 4257556859. The reversal of 4257556842 is 2486557524.

It is a super-2 number, since 2×4257556842² = 36253580525722025928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4257556791 and 4257556800.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68784 + ... + 115092.

It is an arithmetic number, because the mean of its divisors is an integer number (166716000).

Almost surely, 2^4257556842 is an apocalyptic number.

4257556842 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 4257556842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5334912000).

4257556842 is an abundant number, since it is smaller than the sum of its proper divisors (6412267158).

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

4257556842 is a wasteful number, since it uses less digits than its factorization.

4257556842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46531.

The product of its digits is 2688000, while the sum is 48.

The square root of 4257556842 is about 65249.9566436638. The cubic root of 4257556842 is about 1620.7653805984.

The spelling of 4257556842 in words is "four billion, two hundred fifty-seven million, five hundred fifty-six thousand, eight hundred forty-two".