2154045241985 has 32 divisors (see below), whose sum is σ = 3255344252160. Its totient is φ = 1331731715328.

The previous prime is 2154045241981. The next prime is 2154045241993. The reversal of 2154045241985 is 5891425404512.

It is not a de Polignac number, because 2154045241985 - 2² = 2154045241981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2154045241981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55028870 + ... + 55067999.

It is an arithmetic number, because the mean of its divisors is an integer number (101729507880).

Almost surely, 2^{2154045241985} is an apocalyptic number.

It is an amenable number.

2154045241985 is a deficient number, since it is larger than the sum of its proper divisors (1101299010175).

2154045241985 is a wasteful number, since it uses less digits than its factorization.

2154045241985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110096937.

The product of its (nonzero) digits is 2304000, while the sum is 50.

The spelling of 2154045241985 in words is "two trillion, one hundred fifty-four billion, forty-five million, two hundred forty-one thousand, nine hundred eighty-five".