2134605251645 has 4 divisors (see below), whose sum is σ = 2561526301980. Its totient is φ = 1707684201312.

The previous prime is 2134605251567. The next prime is 2134605251741. The reversal of 2134605251645 is 5461525064312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 544438855321 + 1590166396324 = 737861^2 + 1261018^2 .

It is a cyclic number.

It is not a de Polignac number, because 2134605251645 - 2¹⁴ = 2134605235261 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2134605251596 and 2134605251605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213460525160 + ... + 213460525169.

It is an arithmetic number, because the mean of its divisors is an integer number (640381575495).

Almost surely, 2^{2134605251645} is an apocalyptic number.

It is an amenable number.

2134605251645 is a deficient number, since it is larger than the sum of its proper divisors (426921050335).

2134605251645 is an equidigital number, since it uses as much as digits as its factorization.

2134605251645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426921050334.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 2134605251645 in words is "two trillion, one hundred thirty-four billion, six hundred five million, two hundred fifty-one thousand, six hundred forty-five".