6451206140161 has 4 divisors (see below), whose sum is σ = 6523691602500. Its totient is φ = 6378720677824.

The previous prime is 6451206140131. The next prime is 6451206140177. The reversal of 6451206140161 is 1610416021546.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 895493153025 + 5555712987136 = 946305^2 + 2357056^2 .

It is a cyclic number.

It is not a de Polignac number, because 6451206140161 - 2¹⁹ = 6451205615873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6451206140161.

It is not an unprimeable number, because it can be changed into a prime (6451206140101) 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, 36242731036 + ... + 36242731213.

It is an arithmetic number, because the mean of its divisors is an integer number (1630922900625).

Almost surely, 2^{6451206140161} is an apocalyptic number.

It is an amenable number.

6451206140161 is a deficient number, since it is larger than the sum of its proper divisors (72485462339).

6451206140161 is an equidigital number, since it uses as much as digits as its factorization.

6451206140161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72485462338.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 6451206140161 in words is "six trillion, four hundred fifty-one billion, two hundred six million, one hundred forty thousand, one hundred sixty-one".