111347977505 has 4 divisors (see below), whose sum is σ = 133617573012. Its totient is φ = 89078382000.

The previous prime is 111347977501. The next prime is 111347977537. The reversal of 111347977505 is 505779743111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505779743111 = 619 ⋅817091669.

It can be written as a sum of positive squares in 2 ways, for example, as 89047931281 + 22300046224 = 298409^2 + 149332^2 .

It is not a de Polignac number, because 111347977505 - 2² = 111347977501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111347977501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11134797746 + ... + 11134797755.

It is an arithmetic number, because the mean of its divisors is an integer number (33404393253).

Almost surely, 2^111347977505 is an apocalyptic number.

It is an amenable number.

111347977505 is a deficient number, since it is larger than the sum of its proper divisors (22269595507).

111347977505 is an equidigital number, since it uses as much as digits as its factorization.

111347977505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22269595506.

The product of its (nonzero) digits is 926100, while the sum is 50.

The spelling of 111347977505 in words is "one hundred eleven billion, three hundred forty-seven million, nine hundred seventy-seven thousand, five hundred five".