2145147272045 has 8 divisors (see below), whose sum is σ = 2592966338424. Its totient is φ = 1703591409664.

The previous prime is 2145147271973. The next prime is 2145147272053. The reversal of 2145147272045 is 5402727415412.

It can be written as a sum of positive squares in 4 ways, for example, as 17952169 + 2145129319876 = 4237^2 + 1464626^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145147272045 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2145147271987 and 2145147272005.

It is a congruent number.

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, 1565800244 + ... + 1565801613.

It is an arithmetic number, because the mean of its divisors is an integer number (324120792303).

Almost surely, 2^{2145147272045} is an apocalyptic number.

It is an amenable number.

2145147272045 is a deficient number, since it is larger than the sum of its proper divisors (447819066379).

2145147272045 is a wasteful number, since it uses less digits than its factorization.

2145147272045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131601999.

The product of its (nonzero) digits is 627200, while the sum is 44.

The spelling of 2145147272045 in words is "two trillion, one hundred forty-five billion, one hundred forty-seven million, two hundred seventy-two thousand, forty-five".