71461680 has 40 divisors (see below), whose sum is σ = 221531952. Its totient is φ = 19056384.

The previous prime is 71461669. The next prime is 71461681. The reversal of 71461680 is 8616417.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (71461681) 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, 148639 + ... + 149118.

Almost surely, 2^71461680 is an apocalyptic number.

It is an amenable number.

71461680 is an abundant number, since it is smaller than the sum of its proper divisors (150070272).

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

71461680 is a wasteful number, since it uses less digits than its factorization.

71461680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297773 (or 297767 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 71461680 is about 8453.5010498609. The cubic root of 71461680 is about 414.9773636465.

The spelling of 71461680 in words is "seventy-one million, four hundred sixty-one thousand, six hundred eighty".