71099367887 has 4 divisors (see below), whose sum is σ = 71102169840. Its totient is φ = 71096565936.

The previous prime is 71099367877. The next prime is 71099367893. The reversal of 71099367887 is 78876399017.

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 71099367887 - 2¹⁴ = 71099351503 is a prime.

It is a super-2 number, since 2×71099367887² (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 (71099367877) 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, 1362563 + ... + 1413780.

It is an arithmetic number, because the mean of its divisors is an integer number (17775542460).

Almost surely, 2^71099367887 is an apocalyptic number.

71099367887 is a deficient number, since it is larger than the sum of its proper divisors (2801953).

71099367887 is a wasteful number, since it uses less digits than its factorization.

71099367887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801952.

The product of its (nonzero) digits is 32006016, while the sum is 65.

The spelling of 71099367887 in words is "seventy-one billion, ninety-nine million, three hundred sixty-seven thousand, eight hundred eighty-seven".