71061608232631 has 4 divisors (see below), whose sum is σ = 71765188512264. Its totient is φ = 70358027953000.

The previous prime is 71061608232583. The next prime is 71061608232661. The reversal of 71061608232631 is 13623280616017.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71061608232631 is a prime.

It is a super-2 number, since 2×71061608232631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71061608232661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351790139665 + ... + 351790139866.

It is an arithmetic number, because the mean of its divisors is an integer number (17941297128066).

Almost surely, 2^{71061608232631} is an apocalyptic number.

71061608232631 is a deficient number, since it is larger than the sum of its proper divisors (703580279633).

71061608232631 is a wasteful number, since it uses less digits than its factorization.

71061608232631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703580279632.

The product of its (nonzero) digits is 435456, while the sum is 46.

Adding to 71061608232631 its reverse (13623280616017), we get a palindrome (84684888848648).

The spelling of 71061608232631 in words is "seventy-one trillion, sixty-one billion, six hundred eight million, two hundred thirty-two thousand, six hundred thirty-one".