71507013680 has 80 divisors (see below), whose sum is σ = 167072592384. Its totient is φ = 28462237440.

The previous prime is 71507013637. The next prime is 71507013689. The reversal of 71507013680 is 8631070517.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×71507013680² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71507013689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20623307 + ... + 20626773.

Almost surely, 2^71507013680 is an apocalyptic number.

It is an amenable number.

71507013680 is an abundant number, since it is smaller than the sum of its proper divisors (95565578704).

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

71507013680 is a wasteful number, since it uses less digits than its factorization.

71507013680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4674 (or 4668 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 71507013680 in words is "seventy-one billion, five hundred seven million, thirteen thousand, six hundred eighty".