2178057456 has 60 divisors (see below), whose sum is σ = 6225247392. Its totient is φ = 710569728.

The previous prime is 2178057451. The next prime is 2178057463. The reversal of 2178057456 is 6547508712.

2178057456 is a `hidden beast` number, since 2 + 1 + 78 + 0 + 574 + 5 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178057451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154141 + ... + 167676.

Almost surely, 2^2178057456 is an apocalyptic number.

It is an amenable number.

2178057456 is an abundant number, since it is smaller than the sum of its proper divisors (4047189936).

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

2178057456 is a wasteful number, since it uses less digits than its factorization.

2178057456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321878 (or 321869 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The square root of 2178057456 is about 46669.6631228467. The cubic root of 2178057456 is about 1296.2530084456.

The spelling of 2178057456 in words is "two billion, one hundred seventy-eight million, fifty-seven thousand, four hundred fifty-six".