71508146749 has 24 divisors (see below), whose sum is σ = 81390865920. Its totient is φ = 62444444832.

The previous prime is 71508146737. The next prime is 71508146767. The reversal of 71508146749 is 94764180517.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-71508146749 is a prime.

It is a super-2 number, since 2×71508146749² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71508146696 and 71508146705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71508146719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3401332 + ... + 3422290.

It is an arithmetic number, because the mean of its divisors is an integer number (3391286080).

Almost surely, 2^71508146749 is an apocalyptic number.

It is an amenable number.

71508146749 is a deficient number, since it is larger than the sum of its proper divisors (9882719171).

71508146749 is a wasteful number, since it uses less digits than its factorization.

71508146749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21737 (or 21718 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 71508146749 in words is "seventy-one billion, five hundred eight million, one hundred forty-six thousand, seven hundred forty-nine".