4636912878 has 48 divisors (see below), whose sum is σ = 11220199536. Its totient is φ = 1426740480.

The previous prime is 4636912873. The next prime is 4636912909. The reversal of 4636912878 is 8782196364.

4636912878 is a `hidden beast` number, since 463 + 6 + 91 + 28 + 78 = 666.

It is a super-2 number, since 2×4636912878² = 43001922076324485768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4636912873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 360643 + ... + 373278.

It is an arithmetic number, because the mean of its divisors is an integer number (233754157).

Almost surely, 2^4636912878 is an apocalyptic number.

4636912878 is an abundant number, since it is smaller than the sum of its proper divisors (6583286658).

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

4636912878 is a wasteful number, since it uses less digits than its factorization.

4636912878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733951 (or 733939 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 4636912878 is about 68094.8814375941. The cubic root of 4636912878 is about 1667.5401985563.

The spelling of 4636912878 in words is "four billion, six hundred thirty-six million, nine hundred twelve thousand, eight hundred seventy-eight".