71369645680 has 40 divisors (see below), whose sum is σ = 165945753792. Its totient is φ = 28545909504.

The previous prime is 71369645663. The next prime is 71369645687. The reversal of 71369645680 is 8654696317.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71369645687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1943974 + ... + 1980346.

Almost surely, 2^71369645680 is an apocalyptic number.

It is an amenable number.

71369645680 is an abundant number, since it is smaller than the sum of its proper divisors (94576108112).

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

71369645680 is a wasteful number, since it uses less digits than its factorization.

71369645680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60913 (or 60907 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 71369645680 in words is "seventy-one billion, three hundred sixty-nine million, six hundred forty-five thousand, six hundred eighty".