71908896031 has 4 divisors (see below), whose sum is σ = 82181595472. Its totient is φ = 61636196592.

The previous prime is 71908896029. The next prime is 71908896119. The reversal of 71908896031 is 13069880917.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71908896031 - 2¹ = 71908896029 is a prime.

It is a super-2 number, since 2×71908896031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71908896031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71908899031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5136349710 + ... + 5136349723.

It is an arithmetic number, because the mean of its divisors is an integer number (20545398868).

Almost surely, 2^71908896031 is an apocalyptic number.

71908896031 is a deficient number, since it is larger than the sum of its proper divisors (10272699441).

71908896031 is a wasteful number, since it uses less digits than its factorization.

71908896031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10272699440.

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 71908896031 in words is "seventy-one billion, nine hundred eight million, eight hundred ninety-six thousand, thirty-one".