2155445156142 has 48 divisors (see below), whose sum is σ = 4750117484112. Its totient is φ = 706222661760.

The previous prime is 2155445156107. The next prime is 2155445156149. The reversal of 2155445156142 is 2416515445512.

2155445156142 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 4 + 45 + 1 + 561 + 42 = 666.

It is a super-2 number, since 2×2155445156142² (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 (2155445156149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1382503 + ... + 2494434.

It is an arithmetic number, because the mean of its divisors is an integer number (98960780919).

Almost surely, 2^{2155445156142} is an apocalyptic number.

2155445156142 is an abundant number, since it is smaller than the sum of its proper divisors (2594672327970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155445156142 is a wasteful number, since it uses less digits than its factorization.

2155445156142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877473 (or 3877470 counting only the distinct ones).

The product of its digits is 960000, while the sum is 45.

The spelling of 2155445156142 in words is "two trillion, one hundred fifty-five billion, four hundred forty-five million, one hundred fifty-six thousand, one hundred forty-two".