7781346325 has 12 divisors (see below), whose sum is σ = 9660534340. Its totient is φ = 6217551360.

The previous prime is 7781346319. The next prime is 7781346343. The reversal of 7781346325 is 5236431877.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 27311076 + 7754035249 = 5226^2 + 88057^2 .

It is not a de Polignac number, because 7781346325 - 2¹⁹ = 7780822037 is a prime.

It is a congruent 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, 167004 + ... + 208453.

Almost surely, 2^7781346325 is an apocalyptic number.

It is an amenable number.

7781346325 is a deficient number, since it is larger than the sum of its proper divisors (1879188015).

7781346325 is a wasteful number, since it uses less digits than its factorization.

7781346325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376296 (or 376291 counting only the distinct ones).

The product of its digits is 846720, while the sum is 46.

The square root of 7781346325 is about 88211.9398097559. The cubic root of 7781346325 is about 1981.6102879165.

The spelling of 7781346325 in words is "seven billion, seven hundred eighty-one million, three hundred forty-six thousand, three hundred twenty-five".