71516671722 has 12 divisors (see below), whose sum is σ = 154952788770. Its totient is φ = 23838890568.

The previous prime is 71516671717. The next prime is 71516671727. The reversal of 71516671722 is 22717661517.

71516671722 is a `hidden beast` number, since 7 + 1 + 516 + 67 + 1 + 72 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (71516671717) and next prime (71516671727).

It can be written as a sum of positive squares in only one way, i.e., 57351149361 + 14165522361 = 239481^2 + 119019^2 .

It is a super-2 number, since 2×71516671722² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71516671727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1986574197 + ... + 1986574232.

Almost surely, 2^71516671722 is an apocalyptic number.

71516671722 is an abundant number, since it is smaller than the sum of its proper divisors (83436117048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71516671722 is a wasteful number, since it uses less digits than its factorization.

71516671722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973148437 (or 3973148434 counting only the distinct ones).

The product of its digits is 246960, while the sum is 45.

The spelling of 71516671722 in words is "seventy-one billion, five hundred sixteen million, six hundred seventy-one thousand, seven hundred twenty-two".