4009557155 has 4 divisors (see below), whose sum is σ = 4811468592. Its totient is φ = 3207645720.

The previous prime is 4009557119. The next prime is 4009557187. The reversal of 4009557155 is 5517559004.

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

It is not a de Polignac number, because 4009557155 - 2⁶ = 4009557091 is a prime.

It is a Duffinian number.

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, 400955711 + ... + 400955720.

It is an arithmetic number, because the mean of its divisors is an integer number (1202867148).

Almost surely, 2^4009557155 is an apocalyptic number.

4009557155 is a deficient number, since it is larger than the sum of its proper divisors (801911437).

4009557155 is an equidigital number, since it uses as much as digits as its factorization.

4009557155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801911436.

The product of its (nonzero) digits is 157500, while the sum is 41.

The square root of 4009557155 is about 63321.0640703392. The cubic root of 4009557155 is about 1588.6642995724.

The spelling of 4009557155 in words is "four billion, nine million, five hundred fifty-seven thousand, one hundred fifty-five".