2778558772 has 12 divisors (see below), whose sum is σ = 5304521376. Its totient is φ = 1262981240.

The previous prime is 2778558767. The next prime is 2778558779.

2778558772 is nontrivially palindromic in base 10.

2778558772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778558779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31574488 + ... + 31574575.

It is an arithmetic number, because the mean of its divisors is an integer number (442043448).

Almost surely, 2^2778558772 is an apocalyptic number.

2778558772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2778558772 is a deficient number, since it is larger than the sum of its proper divisors (2525962604).

2778558772 is a wasteful number, since it uses less digits than its factorization.

2778558772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63149078 (or 63149076 counting only the distinct ones).

The product of its digits is 15366400, while the sum is 58.

The square root of 2778558772 is about 52712.0363105050. The cubic root of 2778558772 is about 1405.8528396990.

The spelling of 2778558772 in words is "two billion, seven hundred seventy-eight million, five hundred fifty-eight thousand, seven hundred seventy-two".