720162105671 has 4 divisors (see below), whose sum is σ = 735484703712. Its totient is φ = 704839507632.

The previous prime is 720162105613. The next prime is 720162105701. The reversal of 720162105671 is 176501261027.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720162105671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720162105071) 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 3 ways as a sum of consecutive naturals, for example, 7661298950 + ... + 7661299043.

It is an arithmetic number, because the mean of its divisors is an integer number (183871175928).

Almost surely, 2^720162105671 is an apocalyptic number.

720162105671 is a deficient number, since it is larger than the sum of its proper divisors (15322598041).

720162105671 is a wasteful number, since it uses less digits than its factorization.

720162105671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15322598040.

The product of its (nonzero) digits is 35280, while the sum is 38.

Adding to 720162105671 its reverse (176501261027), we get a palindrome (896663366698).

The spelling of 720162105671 in words is "seven hundred twenty billion, one hundred sixty-two million, one hundred five thousand, six hundred seventy-one".