71981625503 has 2 divisors, whose sum is σ = 71981625504. Its totient is φ = 71981625502.

The previous prime is 71981625479. The next prime is 71981625553. The reversal of 71981625503 is 30552618917.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71981625503 - 2³⁰ = 70907883679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71981625553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35990812751 + 35990812752.

It is an arithmetic number, because the mean of its divisors is an integer number (35990812752).

Almost surely, 2^71981625503 is an apocalyptic number.

71981625503 is a deficient number, since it is larger than the sum of its proper divisors (1).

71981625503 is an equidigital number, since it uses as much as digits as its factorization.

71981625503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 71981625503 in words is "seventy-one billion, nine hundred eighty-one million, six hundred twenty-five thousand, five hundred three".