11701897887 has 16 divisors (see below), whose sum is σ = 16806094848. Its totient is φ = 7221366240.

The previous prime is 11701897847. The next prime is 11701897901. The reversal of 11701897887 is 78879810711.

It is not a de Polignac number, because 11701897887 - 2³² = 7406930591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11701897847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2733228 + ... + 2737505.

It is an arithmetic number, because the mean of its divisors is an integer number (1050380928).

Almost surely, 2^11701897887 is an apocalyptic number.

11701897887 is a deficient number, since it is larger than the sum of its proper divisors (5104196961).

11701897887 is a wasteful number, since it uses less digits than its factorization.

11701897887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470790.

The product of its (nonzero) digits is 1580544, while the sum is 57.

The spelling of 11701897887 in words is "eleven billion, seven hundred one million, eight hundred ninety-seven thousand, eight hundred eighty-seven".