4020554155 has 4 divisors (see below), whose sum is σ = 4824664992. Its totient is φ = 3216443320.

The previous prime is 4020554141. The next prime is 4020554203. The reversal of 4020554155 is 5514550204.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-4020554155 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402055411 + ... + 402055420.

It is an arithmetic number, because the mean of its divisors is an integer number (1206166248).

Almost surely, 2^4020554155 is an apocalyptic number.

4020554155 is a deficient number, since it is larger than the sum of its proper divisors (804110837).

4020554155 is an equidigital number, since it uses as much as digits as its factorization.

4020554155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804110836.

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 4020554155 is about 63407.8398543902. The cubic root of 4020554155 is about 1590.1153819727.

The spelling of 4020554155 in words is "four billion, twenty million, five hundred fifty-four thousand, one hundred fifty-five".