2145122152884 has 36 divisors (see below), whose sum is σ = 5741356352004. Its totient is φ = 672979498752.

The previous prime is 2145122152871. The next prime is 2145122152889. The reversal of 2145122152884 is 4882512215412.

2145122152884 is a `hidden beast` number, since 2 + 1 + 4 + 512 + 2 + 1 + 52 + 8 + 84 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1141418730384 + 1003703422500 = 1068372^2 + 1001850^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145122152889) 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, 1752550167 + ... + 1752551390.

It is an arithmetic number, because the mean of its divisors is an integer number (159482120889).

Almost surely, 2^{2145122152884} is an apocalyptic number.

It is an amenable number.

2145122152884 is an abundant number, since it is smaller than the sum of its proper divisors (3596234199120).

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

2145122152884 is a wasteful number, since it uses less digits than its factorization.

2145122152884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505101584 (or 3505101579 counting only the distinct ones).

The product of its digits is 409600, while the sum is 45.

The spelling of 2145122152884 in words is "two trillion, one hundred forty-five billion, one hundred twenty-two million, one hundred fifty-two thousand, eight hundred eighty-four".