545121555 has 64 divisors (see below), whose sum is σ = 1011225600. Its totient is φ = 248209920.

The previous prime is 545121547. The next prime is 545121569. The reversal of 545121555 is 555121545.

545121555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 545121555 - 2³ = 545121547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 175506 + ... + 178584.

It is an arithmetic number, because the mean of its divisors is an integer number (15800400).

Almost surely, 2^545121555 is an apocalyptic number.

545121555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

545121555 is a deficient number, since it is larger than the sum of its proper divisors (466104045).

545121555 is a wasteful number, since it uses less digits than its factorization.

545121555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164.

The product of its digits is 25000, while the sum is 33.

The square root of 545121555 is about 23347.8383367711. The cubic root of 545121555 is about 816.8916402727.

The spelling of 545121555 in words is "five hundred forty-five million, one hundred twenty-one thousand, five hundred fifty-five".