71551677213 has 16 divisors (see below), whose sum is σ = 112237925760. Its totient is φ = 44895169728.

The previous prime is 71551677163. The next prime is 71551677271. The reversal of 71551677213 is 31277615517.

71551677213 is a `hidden beast` number, since 7 + 1 + 551 + 6 + 77 + 21 + 3 = 666.

It is not a de Polignac number, because 71551677213 - 2²⁰ = 71550628637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71551687213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77942545 + ... + 77943462.

It is an arithmetic number, because the mean of its divisors is an integer number (7014870360).

Almost surely, 2^71551677213 is an apocalyptic number.

It is an amenable number.

71551677213 is a deficient number, since it is larger than the sum of its proper divisors (40686248547).

71551677213 is a wasteful number, since it uses less digits than its factorization.

71551677213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155886033 (or 155886027 counting only the distinct ones).

The product of its digits is 308700, while the sum is 45.

The spelling of 71551677213 in words is "seventy-one billion, five hundred fifty-one million, six hundred seventy-seven thousand, two hundred thirteen".