2791768145 has 4 divisors (see below), whose sum is σ = 3350121780. Its totient is φ = 2233414512.

The previous prime is 2791768099. The next prime is 2791768171. The reversal of 2791768145 is 5418671972.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1700655121 + 1091113024 = 41239^2 + 33032^2 .

It is a cyclic number.

It is not a de Polignac number, because 2791768145 - 2⁸ = 2791767889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2791768093 and 2791768102.

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, 279176810 + ... + 279176819.

It is an arithmetic number, because the mean of its divisors is an integer number (837530445).

Almost surely, 2^2791768145 is an apocalyptic number.

It is an amenable number.

2791768145 is a deficient number, since it is larger than the sum of its proper divisors (558353635).

2791768145 is an equidigital number, since it uses as much as digits as its factorization.

2791768145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558353634.

The product of its digits is 846720, while the sum is 50.

The square root of 2791768145 is about 52837.1852486485. The cubic root of 2791768145 is about 1408.0771443788.

The spelling of 2791768145 in words is "two billion, seven hundred ninety-one million, seven hundred sixty-eight thousand, one hundred forty-five".