71148563611 has 4 divisors (see below), whose sum is σ = 71546041800. Its totient is φ = 70751085424.

The previous prime is 71148563609. The next prime is 71148563621. The reversal of 71148563611 is 11636584117.

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 71148563611 - 2¹ = 71148563609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71148563621) 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, 198738826 + ... + 198739183.

It is an arithmetic number, because the mean of its divisors is an integer number (17886510450).

Almost surely, 2^71148563611 is an apocalyptic number.

71148563611 is a deficient number, since it is larger than the sum of its proper divisors (397478189).

71148563611 is a wasteful number, since it uses less digits than its factorization.

71148563611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397478188.

The product of its digits is 120960, while the sum is 43.

The spelling of 71148563611 in words is "seventy-one billion, one hundred forty-eight million, five hundred sixty-three thousand, six hundred eleven".