1643252247151 has 4 divisors (see below), whose sum is σ = 1643388640000. Its totient is φ = 1643115854304.

The previous prime is 1643252247121. The next prime is 1643252247173. The reversal of 1643252247151 is 1517422523461.

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 1643252247151 - 2⁹ = 1643252246639 is a prime.

It is a super-2 number, since 2×1643252247151² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1643252247098 and 1643252247107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1643252247121) 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, 68178351 + ... + 68202448.

It is an arithmetic number, because the mean of its divisors is an integer number (410847160000).

Almost surely, 2^{1643252247151} is an apocalyptic number.

1643252247151 is a deficient number, since it is larger than the sum of its proper divisors (136392849).

1643252247151 is a wasteful number, since it uses less digits than its factorization.

1643252247151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136392848.

The product of its digits is 403200, while the sum is 43.

The spelling of 1643252247151 in words is "one trillion, six hundred forty-three billion, two hundred fifty-two million, two hundred forty-seven thousand, one hundred fifty-one".