154557849541 has 2 divisors, whose sum is σ = 154557849542.
Its totient is φ = 154557849540.
The previous prime is 154557849533. The next prime is 154557849617. The reversal of 154557849541 is 145948755451.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 79744112100 + 74813737441 = 282390^2 + 273521^2
It is an emirp because it is prime and its reverse (145948755451) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 154557849541 - 23 = 154557849533 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (154557844541) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77278924770 + 77278924771.
It is an arithmetic number, because the mean of its divisors is an integer number (77278924771).
Almost surely, 2154557849541 is an apocalyptic number.
It is an amenable number.
154557849541 is a deficient number, since it is larger than the sum of its proper divisors (1).
154557849541 is an equidigital number, since it uses as much as digits as its factorization.
154557849541 is an evil number, because the sum of its binary digits is even.
The product of its digits is 20160000, while the sum is 58.
The spelling of 154557849541 in words is "one hundred fifty-four billion, five hundred fifty-seven million, eight hundred forty-nine thousand, five hundred forty-one".