111661608356 has 6 divisors (see below), whose sum is σ = 195407814630. Its totient is φ = 55830804176.

The previous prime is 111661608343. The next prime is 111661608371. The reversal of 111661608356 is 653806166111.

It can be written as a sum of positive squares in only one way, i.e., 98520654400 + 13140953956 = 313880^2 + 114634^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13957701041 + ... + 13957701048.

It is an arithmetic number, because the mean of its divisors is an integer number (32567969105).

Almost surely, 2^111661608356 is an apocalyptic number.

It is an amenable number.

111661608356 is a deficient number, since it is larger than the sum of its proper divisors (83746206274).

111661608356 is a wasteful number, since it uses less digits than its factorization.

111661608356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27915402093 (or 27915402091 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 111661608356 in words is "one hundred eleven billion, six hundred sixty-one million, six hundred eight thousand, three hundred fifty-six".