111151654561 has 4 divisors (see below), whose sum is σ = 111174394500. Its totient is φ = 111128914624.

The previous prime is 111151654553. The next prime is 111151654567. The reversal of 111151654561 is 165456151111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165456151111 = 12619 ⋅13111669.

It can be written as a sum of positive squares in 2 ways, for example, as 101605387536 + 9546267025 = 318756^2 + 97705^2 .

It is a cyclic number.

It is not a de Polignac number, because 111151654561 - 2³ = 111151654553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111151654561.

It is not an unprimeable number, because it can be changed into a prime (111151654567) 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, 11362636 + ... + 11372413.

It is an arithmetic number, because the mean of its divisors is an integer number (27793598625).

Almost surely, 2^111151654561 is an apocalyptic number.

It is an amenable number.

111151654561 is a deficient number, since it is larger than the sum of its proper divisors (22739939).

111151654561 is an equidigital number, since it uses as much as digits as its factorization.

111151654561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22739938.

The product of its digits is 18000, while the sum is 37.

The spelling of 111151654561 in words is "one hundred eleven billion, one hundred fifty-one million, six hundred fifty-four thousand, five hundred sixty-one".