71189481157 has 2 divisors, whose sum is σ = 71189481158. Its totient is φ = 71189481156.

The previous prime is 71189481119. The next prime is 71189481173. The reversal of 71189481157 is 75118498117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47117648356 + 24071832801 = 217066^2 + 155151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71189481157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71189488157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35594740578 + 35594740579.

It is an arithmetic number, because the mean of its divisors is an integer number (35594740579).

Almost surely, 2^71189481157 is an apocalyptic number.

It is an amenable number.

71189481157 is a deficient number, since it is larger than the sum of its proper divisors (1).

71189481157 is an equidigital number, since it uses as much as digits as its factorization.

71189481157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 52.

The spelling of 71189481157 in words is "seventy-one billion, one hundred eighty-nine million, four hundred eighty-one thousand, one hundred fifty-seven".