1055545155021 has 128 divisors (see below), whose sum is σ = 1786253414400. Its totient is φ = 540903536640.

The previous prime is 1055545155017. The next prime is 1055545155031. The reversal of 1055545155021 is 1205515455501.

It is not a de Polignac number, because 1055545155021 - 2² = 1055545155017 is a prime.

It is a super-2 number, since 2×1055545155021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055545155011) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 235452846 + ... + 235457328.

It is an arithmetic number, because the mean of its divisors is an integer number (13955104800).

Almost surely, 2^{1055545155021} is an apocalyptic number.

It is an amenable number.

1055545155021 is a deficient number, since it is larger than the sum of its proper divisors (730708259379).

1055545155021 is a wasteful number, since it uses less digits than its factorization.

1055545155021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4979.

The product of its (nonzero) digits is 125000, while the sum is 39.

The spelling of 1055545155021 in words is "one trillion, fifty-five billion, five hundred forty-five million, one hundred fifty-five thousand, twenty-one".