2154094081645 has 16 divisors (see below), whose sum is σ = 2861993118528. Its totient is φ = 1543231578240.

The previous prime is 2154094081613. The next prime is 2154094081663. The reversal of 2154094081645 is 5461804904512.

It is not a de Polignac number, because 2154094081645 - 2⁵ = 2154094081613 is a prime.

It is a super-3 number, since 3×2154094081645³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292275024 + ... + 292282393.

It is an arithmetic number, because the mean of its divisors is an integer number (178874569908).

Almost surely, 2^{2154094081645} is an apocalyptic number.

It is an amenable number.

2154094081645 is a deficient number, since it is larger than the sum of its proper divisors (707899036883).

2154094081645 is a wasteful number, since it uses less digits than its factorization.

2154094081645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584557500.

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 2154094081645 in words is "two trillion, one hundred fifty-four billion, ninety-four million, eighty-one thousand, six hundred forty-five".