71439438650 has 24 divisors (see below), whose sum is σ = 138654634464. Its totient is φ = 27333350000.

The previous prime is 71439438647. The next prime is 71439438659. The reversal of 71439438650 is 5683493417.

It is a super-2 number, since 2×71439438650² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71439438659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31059476 + ... + 31061775.

It is an arithmetic number, because the mean of its divisors is an integer number (5777276436).

Almost surely, 2^71439438650 is an apocalyptic number.

71439438650 is a deficient number, since it is larger than the sum of its proper divisors (67215195814).

71439438650 is a wasteful number, since it uses less digits than its factorization.

71439438650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62121286 (or 62121281 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 71439438650 in words is "seventy-one billion, four hundred thirty-nine million, four hundred thirty-eight thousand, six hundred fifty".