71507942943 has 4 divisors (see below), whose sum is σ = 95343923928. Its totient is φ = 47671961960.

The previous prime is 71507942941. The next prime is 71507942983. The reversal of 71507942943 is 34924970517.

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 71507942943 - 2¹ = 71507942941 is a prime.

It is a super-2 number, since 2×71507942943² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71507942941) 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, 11917990488 + ... + 11917990493.

It is an arithmetic number, because the mean of its divisors is an integer number (23835980982).

Almost surely, 2^71507942943 is an apocalyptic number.

71507942943 is a deficient number, since it is larger than the sum of its proper divisors (23835980985).

71507942943 is a wasteful number, since it uses less digits than its factorization.

71507942943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23835980984.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 71507942943 in words is "seventy-one billion, five hundred seven million, nine hundred forty-two thousand, nine hundred forty-three".