71452769971 has 4 divisors (see below), whose sum is σ = 77948476344. Its totient is φ = 64957063600.

The previous prime is 71452769929. The next prime is 71452769977. The reversal of 71452769971 is 17996725417.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17996725417 = 11 ⋅1636065947.

It is not a de Polignac number, because 71452769971 - 2²¹ = 71450672819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71452769977) 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, 3247853170 + ... + 3247853191.

It is an arithmetic number, because the mean of its divisors is an integer number (19487119086).

Almost surely, 2^71452769971 is an apocalyptic number.

71452769971 is a deficient number, since it is larger than the sum of its proper divisors (6495706373).

71452769971 is a wasteful number, since it uses less digits than its factorization.

71452769971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6495706372.

The product of its digits is 6667920, while the sum is 58.

The spelling of 71452769971 in words is "seventy-one billion, four hundred fifty-two million, seven hundred sixty-nine thousand, nine hundred seventy-one".