11430687856 has 120 divisors (see below), whose sum is σ = 26151656544. Its totient is φ = 4825497600.

The previous prime is 11430687841. The next prime is 11430687881. The reversal of 11430687856 is 65878603411.

It is a happy number.

It is a super-2 number, since 2×11430687856² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28505256 + ... + 28505656.

Almost surely, 2^11430687856 is an apocalyptic number.

11430687856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11430687856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13075828272).

11430687856 is an abundant number, since it is smaller than the sum of its proper divisors (14720968688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11430687856 is a wasteful number, since it uses less digits than its factorization.

11430687856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 11430687856 in words is "eleven billion, four hundred thirty million, six hundred eighty-seven thousand, eight hundred fifty-six".