71133507464 has 8 divisors (see below), whose sum is σ = 133375326510. Its totient is φ = 35566753728.

The previous prime is 71133507461. The next prime is 71133507469. The reversal of 71133507464 is 46470533117.

It can be written as a sum of positive squares in only one way, i.e., 52781386564 + 18352120900 = 229742^2 + 135470^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×71133507464² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71133507461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4445844209 + ... + 4445844224.

Almost surely, 2^71133507464 is an apocalyptic number.

It is an amenable number.

71133507464 is a deficient number, since it is larger than the sum of its proper divisors (62241819046).

71133507464 is a wasteful number, since it uses less digits than its factorization.

71133507464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8891688439 (or 8891688435 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 71133507464 in words is "seventy-one billion, one hundred thirty-three million, five hundred seven thousand, four hundred sixty-four".