43057556420 has 96 divisors (see below), whose sum is σ = 97651370880. Its totient is φ = 15898291200.

The previous prime is 43057556411. The next prime is 43057556449. The reversal of 43057556420 is 2465575034.

It is a super-2 number, since 2×43057556420² (a number of 22 digits) contains 22 as substring.

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, 2293070 + ... + 2311770.

It is an arithmetic number, because the mean of its divisors is an integer number (1017201780).

Almost surely, 2^43057556420 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 43057556420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48825685440).

43057556420 is an abundant number, since it is smaller than the sum of its proper divisors (54593814460).

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

43057556420 is a wasteful number, since it uses less digits than its factorization.

43057556420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18885 (or 18883 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 41.

The spelling of 43057556420 in words is "forty-three billion, fifty-seven million, five hundred fifty-six thousand, four hundred twenty".