2748742155 has 32 divisors (see below), whose sum is σ = 5174107200. Its totient is φ = 1379759616.

The previous prime is 2748742093. The next prime is 2748742181. The reversal of 2748742155 is 5512478472.

It is not a de Polignac number, because 2748742155 - 2¹¹ = 2748740107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2748742155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 596560 + ... + 601149.

It is an arithmetic number, because the mean of its divisors is an integer number (161690850).

Almost surely, 2^2748742155 is an apocalyptic number.

2748742155 is a deficient number, since it is larger than the sum of its proper divisors (2425365045).

2748742155 is a wasteful number, since it uses less digits than its factorization.

2748742155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197740 (or 1197734 counting only the distinct ones).

The product of its digits is 627200, while the sum is 45.

The square root of 2748742155 is about 52428.4479552847. The cubic root of 2748742155 is about 1400.8060248022.

The spelling of 2748742155 in words is "two billion, seven hundred forty-eight million, seven hundred forty-two thousand, one hundred fifty-five".