6146345781 has 6 divisors (see below), whose sum is σ = 8878055030. Its totient is φ = 4097563848.

The previous prime is 6146345771. The next prime is 6146345791. The reversal of 6146345781 is 1875436416.

6146345781 is a `hidden beast` number, since 6 + 1 + 4 + 634 + 5 + 7 + 8 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (6146345771) and next prime (6146345791).

It can be written as a sum of positive squares in only one way, i.e., 5145192900 + 1001152881 = 71730^2 + 31641^2 .

It is not a de Polignac number, because 6146345781 - 2⁶ = 6146345717 is a prime.

It is a super-2 number, since 2×6146345781² = 75555132919232999922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6146345731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 341463646 + ... + 341463663.

Almost surely, 2^6146345781 is an apocalyptic number.

It is an amenable number.

6146345781 is a deficient number, since it is larger than the sum of its proper divisors (2731709249).

6146345781 is a wasteful number, since it uses less digits than its factorization.

6146345781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682927315 (or 682927312 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 6146345781 is about 78398.6337954942. The cubic root of 6146345781 is about 1831.7758529508.

The spelling of 6146345781 in words is "six billion, one hundred forty-six million, three hundred forty-five thousand, seven hundred eighty-one".