2776861945 has 32 divisors (see below), whose sum is σ = 3930643584. Its totient is φ = 1856640000.

The previous prime is 2776861937. The next prime is 2776861949. The reversal of 2776861945 is 5491686772.

2776861945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2776861945 - 2³ = 2776861937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2776861949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171729 + ... + 187201.

It is an arithmetic number, because the mean of its divisors is an integer number (122832612).

Almost surely, 2^2776861945 is an apocalyptic number.

It is an amenable number.

2776861945 is a deficient number, since it is larger than the sum of its proper divisors (1153781639).

2776861945 is a wasteful number, since it uses less digits than its factorization.

2776861945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15753.

The product of its digits is 5080320, while the sum is 55.

The square root of 2776861945 is about 52695.9386006170. The cubic root of 2776861945 is about 1405.5666031987.

The spelling of 2776861945 in words is "two billion, seven hundred seventy-six million, eight hundred sixty-one thousand, nine hundred forty-five".