11111071620 has 48 divisors (see below), whose sum is σ = 33939275328. Its totient is φ = 2693592960.

The previous prime is 11111071597. The next prime is 11111071661. The reversal of 11111071620 is 2617011111.

11111071620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×11111071620⁴ (a number of 41 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8416819 + ... + 8418138.

It is an arithmetic number, because the mean of its divisors is an integer number (707068236).

Almost surely, 2^11111071620 is an apocalyptic number.

11111071620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111071620 is an abundant number, since it is smaller than the sum of its proper divisors (22828203708).

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

11111071620 is a wasteful number, since it uses less digits than its factorization.

11111071620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16834980 (or 16834978 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 21.

Adding to 11111071620 its reverse (2617011111), we get a palindrome (13728082731).

The spelling of 11111071620 in words is "eleven billion, one hundred eleven million, seventy-one thousand, six hundred twenty".