2765621145 has 32 divisors (see below), whose sum is σ = 5093544960. Its totient is φ = 1255181760.

The previous prime is 2765621137. The next prime is 2765621191. The reversal of 2765621145 is 5411265672.

It is not a de Polignac number, because 2765621145 - 2³ = 2765621137 is a prime.

It is a super-2 number, since 2×2765621145² = 15297320635342222050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80151 + ... + 109340.

It is an arithmetic number, because the mean of its divisors is an integer number (159173280).

Almost surely, 2^2765621145 is an apocalyptic number.

It is an amenable number.

2765621145 is a deficient number, since it is larger than the sum of its proper divisors (2327923815).

2765621145 is a wasteful number, since it uses less digits than its factorization.

2765621145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189645.

The product of its digits is 100800, while the sum is 39.

The square root of 2765621145 is about 52589.1732678885. The cubic root of 2765621145 is about 1403.6674498099.

The spelling of 2765621145 in words is "two billion, seven hundred sixty-five million, six hundred twenty-one thousand, one hundred forty-five".