111909463905 has 16 divisors (see below), whose sum is σ = 179116136640. Its totient is φ = 59664715968.

The previous prime is 111909463901. The next prime is 111909463933. The reversal of 111909463905 is 509364909111.

It is not a de Polignac number, because 111909463905 - 2² = 111909463901 is a prime.

It is a super-2 number, since 2×111909463905² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111909463901) 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, 1225162 + ... + 1313331.

It is an arithmetic number, because the mean of its divisors is an integer number (11194758540).

Almost surely, 2^111909463905 is an apocalyptic number.

111909463905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111909463905 is a deficient number, since it is larger than the sum of its proper divisors (67206672735).

111909463905 is a wasteful number, since it uses less digits than its factorization.

111909463905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541440.

The product of its (nonzero) digits is 262440, while the sum is 48.

The spelling of 111909463905 in words is "one hundred eleven billion, nine hundred nine million, four hundred sixty-three thousand, nine hundred five".