4557785778 has 96 divisors (see below), whose sum is σ = 12793872000. Its totient is φ = 1138779648.

The previous prime is 4557785773. The next prime is 4557785801. The reversal of 4557785778 is 8775877554.

4557785778 is a `hidden beast` number, since 4 + 5 + 57 + 7 + 8 + 577 + 8 = 666.

It is a super-2 number, since 2×4557785778² = 41546822396278130568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (4557785773) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42103 + ... + 104346.

It is an arithmetic number, because the mean of its divisors is an integer number (133269500).

Almost surely, 2^4557785778 is an apocalyptic number.

4557785778 is an abundant number, since it is smaller than the sum of its proper divisors (8236086222).

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

4557785778 is a wasteful number, since it uses less digits than its factorization.

4557785778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146496 (or 146493 counting only the distinct ones).

The product of its digits is 76832000, while the sum is 63.

The square root of 4557785778 is about 67511.3751748548. The cubic root of 4557785778 is about 1658.0004202794. Note that the first 3 decimals are identical.

The spelling of 4557785778 in words is "four billion, five hundred fifty-seven million, seven hundred eighty-five thousand, seven hundred seventy-eight".