681053825 has 18 divisors (see below), whose sum is σ = 853718982. Its totient is φ = 538921600.

The previous prime is 681053749. The next prime is 681053831. The reversal of 681053825 is 528350186.

681053825 = T₁₂₆ + T₁₂₇ + ... + T₁₅₉₈.

It can be written as a sum of positive squares in 3 ways, for example, as 3857296 + 677196529 = 1964^2 + 26023^2 .

It is not a de Polignac number, because 681053825 - 2¹⁶ = 680988289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1386830 + ... + 1387320.

Almost surely, 2^681053825 is an apocalyptic number.

It is an amenable number.

681053825 is a deficient number, since it is larger than the sum of its proper divisors (172665157).

681053825 is an equidigital number, since it uses as much as digits as its factorization.

681053825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 681053825 is about 26097.0079702636. The cubic root of 681053825 is about 879.8199635999.

The spelling of 681053825 in words is "six hundred eighty-one million, fifty-three thousand, eight hundred twenty-five".