155121055105443 has 64 divisors (see below), whose sum is σ = 256109298204672. Its totient is φ = 81483277478400.

The previous prime is 155121055105427. The next prime is 155121055105483. The reversal of 155121055105443 is 344501550121551.

It is not a de Polignac number, because 155121055105443 - 2⁴ = 155121055105427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155121055105395 and 155121055105404.

It is not an unprimeable number, because it can be changed into a prime (155121055105403) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 448736518 + ... + 449082068.

It is an arithmetic number, because the mean of its divisors is an integer number (4001707784448).

Almost surely, 2^{155121055105443} is an apocalyptic number.

155121055105443 is a deficient number, since it is larger than the sum of its proper divisors (100988243099229).

155121055105443 is a wasteful number, since it uses less digits than its factorization.

155121055105443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374864.

The product of its (nonzero) digits is 300000, while the sum is 42.

The spelling of 155121055105443 in words is "one hundred fifty-five trillion, one hundred twenty-one billion, fifty-five million, one hundred five thousand, four hundred forty-three".