4551856640 has 40 divisors (see below), whose sum is σ = 10913793660. Its totient is φ = 1820741632.

The previous prime is 4551856609. The next prime is 4551856669. The reversal of 4551856640 is 466581554.

It can be written as a sum of positive squares in 2 ways, for example, as 4322273536 + 229583104 = 65744^2 + 15152^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×4551856640² = 41438797742224179200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4551856591 and 4551856600.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 886475 + ... + 891594.

Almost surely, 2^4551856640 is an apocalyptic number.

4551856640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4551856640 is an abundant number, since it is smaller than the sum of its proper divisors (6361937020).

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

4551856640 is an equidigital number, since it uses as much as digits as its factorization.

4551856640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778092 (or 1778076 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 44.

The square root of 4551856640 is about 67467.4487438202. The cubic root of 4551856640 is about 1657.2811544169.

The spelling of 4551856640 in words is "four billion, five hundred fifty-one million, eight hundred fifty-six thousand, six hundred forty".