71602121022157 has 4 divisors (see below), whose sum is σ = 78111404751456. Its totient is φ = 65092837292860.

The previous prime is 71602121022149. The next prime is 71602121022203. The reversal of 71602121022157 is 75122012120617.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71602121022157 - 2³ = 71602121022149 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 (71602121052157) 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, 3254641864633 + ... + 3254641864654.

It is an arithmetic number, because the mean of its divisors is an integer number (19527851187864).

Almost surely, 2^{71602121022157} is an apocalyptic number.

It is an amenable number.

71602121022157 is a deficient number, since it is larger than the sum of its proper divisors (6509283729299).

71602121022157 is a wasteful number, since it uses less digits than its factorization.

71602121022157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6509283729298.

The product of its (nonzero) digits is 23520, while the sum is 37.

The spelling of 71602121022157 in words is "seventy-one trillion, six hundred two billion, one hundred twenty-one million, twenty-two thousand, one hundred fifty-seven".