7780122025 has 81 divisors (see below), whose sum is σ = 11108715429. Its totient is φ = 5402379840.

The previous prime is 7780121977. The next prime is 7780122041. The reversal of 7780122025 is 5202210877.

The square root of 7780122025 is 88205.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2005337961 + 5774784064 = 44781^2 + 75992^2 .

It is not a de Polignac number, because 7780122025 - 2¹³ = 7780113833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 131866446 + ... + 131866504.

Almost surely, 2^7780122025 is an apocalyptic number.

7780122025 is the 88205-th square number.

7780122025 is the 44103-rd centered octagonal number.

It is an amenable number.

7780122025 is a deficient number, since it is larger than the sum of its proper divisors (3328593404).

7780122025 is a wasteful number, since it uses less digits than its factorization.

7780122025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The cubic root of 7780122025 is about 1981.5063550569.

The spelling of 7780122025 in words is "seven billion, seven hundred eighty million, one hundred twenty-two thousand, twenty-five".