776628045 has 12 divisors (see below), whose sum is σ = 1346155356. Its totient is φ = 414201600.

The previous prime is 776628019. The next prime is 776628049. The reversal of 776628045 is 540826677.

It can be written as a sum of positive squares in 2 ways, for example, as 352350441 + 424277604 = 18771^2 + 20598^2 .

It is not a de Polignac number, because 776628045 - 2⁶ = 776627981 is a prime.

It is a super-2 number, since 2×776628045² = 1206302240561044050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 17258401 = 776628045 / (7 + 7 + 6 + 6 + 2 + 8 + 0 + 4 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776628049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8629156 + ... + 8629245.

It is an arithmetic number, because the mean of its divisors is an integer number (112179613).

Almost surely, 2^776628045 is an apocalyptic number.

It is an amenable number.

776628045 is a deficient number, since it is larger than the sum of its proper divisors (569527311).

776628045 is a wasteful number, since it uses less digits than its factorization.

776628045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17258412 (or 17258409 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 776628045 is about 27868.0470252223. The cubic root of 776628045 is about 919.1880221508.

The spelling of 776628045 in words is "seven hundred seventy-six million, six hundred twenty-eight thousand, forty-five".