4455121920 has 88 divisors (see below), whose sum is σ = 14249478144. Its totient is φ = 1188028416.

The previous prime is 4455121877. The next prime is 4455121939. The reversal of 4455121920 is 291215544.

It is a super-2 number, since 2×4455121920² = 39696222644128972800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129664 + ... + 160383.

It is an arithmetic number, because the mean of its divisors is an integer number (161925888).

Almost surely, 2^4455121920 is an apocalyptic number.

4455121920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4455121920 is an abundant number, since it is smaller than the sum of its proper divisors (9794356224).

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

4455121920 is a wasteful number, since it uses less digits than its factorization.

4455121920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290075 (or 290057 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 4455121920 is about 66746.6996936927. The cubic root of 4455121920 is about 1645.4569758648.

The spelling of 4455121920 in words is "four billion, four hundred fifty-five million, one hundred twenty-one thousand, nine hundred twenty".