2156237306444 has 12 divisors (see below), whose sum is σ = 4063678000704. Its totient is φ = 995186449104.

The previous prime is 2156237306423. The next prime is 2156237306449. The reversal of 2156237306444 is 4446037326512.

It is not an unprimeable number, because it can be changed into a prime (2156237306449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20733050972 + ... + 20733051075.

It is an arithmetic number, because the mean of its divisors is an integer number (338639833392).

Almost surely, 2^{2156237306444} is an apocalyptic number.

It is an amenable number.

2156237306444 is a deficient number, since it is larger than the sum of its proper divisors (1907440694260).

2156237306444 is a wasteful number, since it uses less digits than its factorization.

2156237306444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41466102064 (or 41466102062 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 47.

The spelling of 2156237306444 in words is "two trillion, one hundred fifty-six billion, two hundred thirty-seven million, three hundred six thousand, four hundred forty-four".