6861472081 has 2 divisors, whose sum is σ = 6861472082. Its totient is φ = 6861472080.

The previous prime is 6861472073. The next prime is 6861472087. The reversal of 6861472081 is 1802741686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5307851025 + 1553621056 = 72855^2 + 39416^2 .

It is a cyclic number.

It is not a de Polignac number, because 6861472081 - 2³ = 6861472073 is a prime.

It is a super-2 number, since 2×6861472081² = 94159598236684941122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6861472087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3430736040 + 3430736041.

It is an arithmetic number, because the mean of its divisors is an integer number (3430736041).

Almost surely, 2^6861472081 is an apocalyptic number.

It is an amenable number.

6861472081 is a deficient number, since it is larger than the sum of its proper divisors (1).

6861472081 is an equidigital number, since it uses as much as digits as its factorization.

6861472081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 6861472081 is about 82834.0031689885. The cubic root of 6861472081 is about 1900.2282349094.

The spelling of 6861472081 in words is "six billion, eight hundred sixty-one million, four hundred seventy-two thousand, eighty-one".