71499207544 has 8 divisors (see below), whose sum is σ = 134061014160. Its totient is φ = 35749603768.

The previous prime is 71499207539. The next prime is 71499207599. The reversal of 71499207544 is 44570299417.

It is a happy number.

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

It is a super-2 number, since 2×71499207544² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71499207491 and 71499207500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4468700464 + ... + 4468700479.

It is an arithmetic number, because the mean of its divisors is an integer number (16757626770).

Almost surely, 2^71499207544 is an apocalyptic number.

It is an amenable number.

71499207544 is a deficient number, since it is larger than the sum of its proper divisors (62561806616).

71499207544 is a wasteful number, since it uses less digits than its factorization.

71499207544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8937400949 (or 8937400945 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 71499207544 in words is "seventy-one billion, four hundred ninety-nine million, two hundred seven thousand, five hundred forty-four".