6145661986271 has 4 divisors (see below), whose sum is σ = 6152986971600. Its totient is φ = 6138337000944.

The previous prime is 6145661986253. The next prime is 6145661986279. The reversal of 6145661986271 is 1726891665416.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6145661986271 - 2¹⁸ = 6145661724127 is a prime.

It is a super-2 number, since 2×6145661986271² (a number of 26 digits) 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 (6145661986279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3662491406 + ... + 3662493083.

It is an arithmetic number, because the mean of its divisors is an integer number (1538246742900).

Almost surely, 2^{6145661986271} is an apocalyptic number.

6145661986271 is a deficient number, since it is larger than the sum of its proper divisors (7324985329).

6145661986271 is an equidigital number, since it uses as much as digits as its factorization.

6145661986271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7324985328.

The product of its digits is 26127360, while the sum is 62.

The spelling of 6145661986271 in words is "six trillion, one hundred forty-five billion, six hundred sixty-one million, nine hundred eighty-six thousand, two hundred seventy-one".