154242055342543 has 12 divisors (see below), whose sum is σ = 187225493975280. Its totient is φ = 126459324876192.

The previous prime is 154242055342519. The next prime is 154242055342577. The reversal of 154242055342543 is 345243550242451.

It is not a de Polignac number, because 154242055342543 - 2⁴⁵ = 119057683253711 is a prime.

It is a super-2 number, since 2×154242055342543² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154242055348543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68430369478 + ... + 68430371731.

It is an arithmetic number, because the mean of its divisors is an integer number (15602124497940).

Almost surely, 2^{154242055342543} is an apocalyptic number.

154242055342543 is a deficient number, since it is larger than the sum of its proper divisors (32983438632737).

154242055342543 is a wasteful number, since it uses less digits than its factorization.

154242055342543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136860741246 (or 136860741239 counting only the distinct ones).

The product of its (nonzero) digits is 11520000, while the sum is 49.

The spelling of 154242055342543 in words is "one hundred fifty-four trillion, two hundred forty-two billion, fifty-five million, three hundred forty-two thousand, five hundred forty-three".