11388778870 has 16 divisors (see below), whose sum is σ = 23428345248. Its totient is φ = 3904724160.

The previous prime is 11388778861. The next prime is 11388778939. The reversal of 11388778870 is 7887788311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81348351 + ... + 81348490.

It is an arithmetic number, because the mean of its divisors is an integer number (1464271578).

Almost surely, 2^11388778870 is an apocalyptic number.

11388778870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11388778870 is an abundant number, since it is smaller than the sum of its proper divisors (12039566378).

11388778870 is a wasteful number, since it uses less digits than its factorization.

11388778870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162696855.

The product of its (nonzero) digits is 4214784, while the sum is 58.

The spelling of 11388778870 in words is "eleven billion, three hundred eighty-eight million, seven hundred seventy-eight thousand, eight hundred seventy".