71239639430 has 8 divisors (see below), whose sum is σ = 128231350992. Its totient is φ = 28495855768.

The previous prime is 71239639411. The next prime is 71239639463. The reversal of 71239639430 is 3493693217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×71239639430² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3561981962 + ... + 3561981981.

It is an arithmetic number, because the mean of its divisors is an integer number (16028918874).

Almost surely, 2^71239639430 is an apocalyptic number.

71239639430 is a deficient number, since it is larger than the sum of its proper divisors (56991711562).

71239639430 is a wasteful number, since it uses less digits than its factorization.

71239639430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7123963950.

The product of its (nonzero) digits is 734832, while the sum is 47.

The spelling of 71239639430 in words is "seventy-one billion, two hundred thirty-nine million, six hundred thirty-nine thousand, four hundred thirty".