2628778773 has 8 divisors (see below), whose sum is σ = 3513868768. Its totient is φ = 1748103984.

The previous prime is 2628778771. The next prime is 2628778787. The reversal of 2628778773 is 3778778262.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2628778773 - 2¹ = 2628778771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2628778771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1102411 + ... + 1104792.

It is an arithmetic number, because the mean of its divisors is an integer number (439233596).

Almost surely, 2^2628778773 is an apocalyptic number.

It is an amenable number.

2628778773 is a deficient number, since it is larger than the sum of its proper divisors (885089995).

2628778773 is a wasteful number, since it uses less digits than its factorization.

2628778773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207603.

The product of its digits is 11063808, while the sum is 57.

The square root of 2628778773 is about 51271.6176163772. The cubic root of 2628778773 is about 1380.1236976916.

The spelling of 2628778773 in words is "two billion, six hundred twenty-eight million, seven hundred seventy-eight thousand, seven hundred seventy-three".