71500787157 has 4 divisors (see below), whose sum is σ = 95334382880. Its totient is φ = 47667191436.

The previous prime is 71500787147. The next prime is 71500787167. The reversal of 71500787157 is 75178700517.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (71500787147) and next prime (71500787167).

It is not a de Polignac number, because 71500787157 - 2²⁴ = 71484009941 is a prime.

It is a super-2 number, since 2×71500787157² (a number of 23 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 (71500787147) 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, 11916797857 + ... + 11916797862.

It is an arithmetic number, because the mean of its divisors is an integer number (23833595720).

Almost surely, 2^71500787157 is an apocalyptic number.

It is an amenable number.

71500787157 is a deficient number, since it is larger than the sum of its proper divisors (23833595723).

71500787157 is a wasteful number, since it uses less digits than its factorization.

71500787157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23833595722.

The product of its (nonzero) digits is 480200, while the sum is 48.

The spelling of 71500787157 in words is "seventy-one billion, five hundred million, seven hundred eighty-seven thousand, one hundred fifty-seven".