10891108914 has 64 divisors (see below), whose sum is σ = 25719275520. Its totient is φ = 3008756160.

The previous prime is 10891108903. The next prime is 10891108919. The reversal of 10891108914 is 41980119801.

It is a happy number.

It is a super-2 number, since 2×10891108914² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (10891108919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1870672 + ... + 1876484.

It is an arithmetic number, because the mean of its divisors is an integer number (401863680).

Almost surely, 2^10891108914 is an apocalyptic number.

10891108914 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10891108914, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12859637760).

10891108914 is an abundant number, since it is smaller than the sum of its proper divisors (14828166606).

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

10891108914 is a wasteful number, since it uses less digits than its factorization.

10891108914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7295.

The product of its (nonzero) digits is 20736, while the sum is 42.

It can be divided in two parts, 10891 and 108914, that added together give a triangular number (119805 = T₄₈₉).

The spelling of 10891108914 in words is "ten billion, eight hundred ninety-one million, one hundred eight thousand, nine hundred fourteen".