2154434100545 has 8 divisors (see below), whose sum is σ = 2585329905960. Its totient is φ = 1723541290240.

The previous prime is 2154434100463. The next prime is 2154434100571. The reversal of 2154434100545 is 5450014344512.

It can be written as a sum of positive squares in 4 ways, for example, as 468173429824 + 1686260670721 = 684232^2 + 1298561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2154434100545 - 2⁸ = 2154434100289 is a prime.

It is a super-2 number, since 2×2154434100545² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2154434100499 and 2154434100508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1388135 + ... + 2497155.

It is an arithmetic number, because the mean of its divisors is an integer number (323166238245).

Almost surely, 2^{2154434100545} is an apocalyptic number.

It is an amenable number.

2154434100545 is a deficient number, since it is larger than the sum of its proper divisors (430895805415).

2154434100545 is a wasteful number, since it uses less digits than its factorization.

2154434100545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497555.

The product of its (nonzero) digits is 192000, while the sum is 38.

The spelling of 2154434100545 in words is "two trillion, one hundred fifty-four billion, four hundred thirty-four million, one hundred thousand, five hundred forty-five".