111487555541 has 2 divisors, whose sum is σ = 111487555542. Its totient is φ = 111487555540.

The previous prime is 111487555519. The next prime is 111487555547. The reversal of 111487555541 is 145555784111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110708587441 + 778968100 = 332729^2 + 27910^2 .

It is an emirp because it is prime and its reverse (145555784111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111487555541 - 2⁶ = 111487555477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111487555547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55743777770 + 55743777771.

It is an arithmetic number, because the mean of its divisors is an integer number (55743777771).

Almost surely, 2^111487555541 is an apocalyptic number.

It is an amenable number.

111487555541 is a deficient number, since it is larger than the sum of its proper divisors (1).

111487555541 is an equidigital number, since it uses as much as digits as its factorization.

111487555541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560000, while the sum is 47.

The spelling of 111487555541 in words is "one hundred eleven billion, four hundred eighty-seven million, five hundred fifty-five thousand, five hundred forty-one".