11784643870 has 32 divisors (see below), whose sum is σ = 21952814400. Its totient is φ = 4549445376.

The previous prime is 11784643823. The next prime is 11784643873. The reversal of 11784643870 is 7834648711.

It is a super-2 number, since 2×11784643870² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11784643873) 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, 854167 + ... + 867853.

It is an arithmetic number, because the mean of its divisors is an integer number (686025450).

Almost surely, 2^11784643870 is an apocalyptic number.

11784643870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11784643870 is a deficient number, since it is larger than the sum of its proper divisors (10168170530).

11784643870 is a wasteful number, since it uses less digits than its factorization.

11784643870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16692.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 11784643870 in words is "eleven billion, seven hundred eighty-four million, six hundred forty-three thousand, eight hundred seventy".