79645609073671 has 16 divisors (see below), whose sum is σ = 84470320644480. Its totient is φ = 74836518981120.

The previous prime is 79645609073623. The next prime is 79645609073759. The reversal of 79645609073671 is 17637090654697.

It is not a de Polignac number, because 79645609073671 - 2¹⁹ = 79645608549383 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 79645609073671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79645609071671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23426161 + ... + 26609701.

It is an arithmetic number, because the mean of its divisors is an integer number (5279395040280).

Almost surely, 2^{79645609073671} is an apocalyptic number.

79645609073671 is a deficient number, since it is larger than the sum of its proper divisors (4824711570809).

79645609073671 is a wasteful number, since it uses less digits than its factorization.

79645609073671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3185994.

The product of its (nonzero) digits is 360067680, while the sum is 70.

The spelling of 79645609073671 in words is "seventy-nine trillion, six hundred forty-five billion, six hundred nine million, seventy-three thousand, six hundred seventy-one".