71147694377 has 8 divisors (see below), whose sum is σ = 71586032520. Its totient is φ = 70709667840.

The previous prime is 71147694353. The next prime is 71147694389. The reversal of 71147694377 is 77349674117.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26340965401 + 44806728976 = 162299^2 + 211676^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71147694377 - 2²⁸ = 70879258921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71147694307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388727 + ... + 541667.

It is an arithmetic number, because the mean of its divisors is an integer number (8948254065).

Almost surely, 2^71147694377 is an apocalyptic number.

It is an amenable number.

71147694377 is a deficient number, since it is larger than the sum of its proper divisors (438338143).

71147694377 is a wasteful number, since it uses less digits than its factorization.

71147694377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155803.

The product of its digits is 6223392, while the sum is 56.

The spelling of 71147694377 in words is "seventy-one billion, one hundred forty-seven million, six hundred ninety-four thousand, three hundred seventy-seven".