111550206461 has 4 divisors (see below), whose sum is σ = 111550978812. Its totient is φ = 111549434112.

The previous prime is 111550206457. The next prime is 111550206487. The reversal of 111550206461 is 164602055111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 53670988900 + 57879217561 = 231670^2 + 240581^2 .

It is a cyclic number.

It is not a de Polignac number, because 111550206461 - 2² = 111550206457 is a prime.

It is a super-2 number, since 2×111550206461² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111550206451) 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, 97700 + ... + 482333.

It is an arithmetic number, because the mean of its divisors is an integer number (27887744703).

Almost surely, 2^111550206461 is an apocalyptic number.

It is an amenable number.

111550206461 is a deficient number, since it is larger than the sum of its proper divisors (772351).

111550206461 is an equidigital number, since it uses as much as digits as its factorization.

111550206461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772350.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 111550206461 in words is "one hundred eleven billion, five hundred fifty million, two hundred six thousand, four hundred sixty-one".