7749700225 has 12 divisors (see below), whose sum is σ = 9636861996. Its totient is φ = 6182190080.

The previous prime is 7749700169. The next prime is 7749700279. The reversal of 7749700225 is 5220079477.

It can be written as a sum of positive squares in 6 ways, for example, as 379821121 + 7369879104 = 19489^2 + 85848^2 .

It is not a de Polignac number, because 7749700225 - 2³¹ = 5602216577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430252 + ... + 447901.

It is an arithmetic number, because the mean of its divisors is an integer number (803071833).

Almost surely, 2^7749700225 is an apocalyptic number.

It is an amenable number.

7749700225 is a deficient number, since it is larger than the sum of its proper divisors (1887161771).

7749700225 is a wasteful number, since it uses less digits than its factorization.

7749700225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878516 (or 878511 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 7749700225 is about 88032.3816842416. The cubic root of 7749700225 is about 1978.9202888777.

The spelling of 7749700225 in words is "seven billion, seven hundred forty-nine million, seven hundred thousand, two hundred twenty-five".