3061825781 has 4 divisors (see below), whose sum is σ = 3499229472. Its totient is φ = 2624422092.

The previous prime is 3061825777. The next prime is 3061825801. The reversal of 3061825781 is 1875281603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3061825781 - 2² = 3061825777 is a prime.

It is a super-2 number, since 2×3061825781² = 18749554226392519922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3061825181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218701835 + ... + 218701848.

It is an arithmetic number, because the mean of its divisors is an integer number (874807368).

Almost surely, 2^3061825781 is an apocalyptic number.

It is an amenable number.

3061825781 is a deficient number, since it is larger than the sum of its proper divisors (437403691).

3061825781 is an equidigital number, since it uses as much as digits as its factorization.

3061825781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437403690.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 3061825781 is about 55333.7670956894. The cubic root of 3061825781 is about 1452.0898570332.

The spelling of 3061825781 in words is "three billion, sixty-one million, eight hundred twenty-five thousand, seven hundred eighty-one".