2143378172550 has 48 divisors (see below), whose sum is σ = 5354377757712. Its totient is φ = 567395481600.

The previous prime is 2143378172549. The next prime is 2143378172647. The reversal of 2143378172550 is 552718733412.

It is a self number, because there is not a number n which added to its sum of digits gives 2143378172550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52129771 + ... + 52170870.

It is an arithmetic number, because the mean of its divisors is an integer number (111549536619).

Almost surely, 2^{2143378172550} is an apocalyptic number.

2143378172550 is an abundant number, since it is smaller than the sum of its proper divisors (3210999585162).

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

2143378172550 is a wasteful number, since it uses less digits than its factorization.

2143378172550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104300793 (or 104300788 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 2143378172550 in words is "two trillion, one hundred forty-three billion, three hundred seventy-eight million, one hundred seventy-two thousand, five hundred fifty".