2145642577 has 8 divisors (see below), whose sum is σ = 2317317800. Its totient is φ = 1974913920.

The previous prime is 2145642571. The next prime is 2145642593. The reversal of 2145642577 is 7752465412.

It can be written as a sum of positive squares in 4 ways, for example, as 209554576 + 1936088001 = 14476^2 + 44001^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2145642577 - 2¹¹ = 2145640529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145642571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231924 + ... + 240997.

It is an arithmetic number, because the mean of its divisors is an integer number (289664725).

Almost surely, 2^2145642577 is an apocalyptic number.

It is an amenable number.

2145642577 is a deficient number, since it is larger than the sum of its proper divisors (171675223).

2145642577 is a wasteful number, since it uses less digits than its factorization.

2145642577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473283.

The product of its digits is 470400, while the sum is 43.

The square root of 2145642577 is about 46321.0813453227. The cubic root of 2145642577 is about 1289.7903585370.

The spelling of 2145642577 in words is "two billion, one hundred forty-five million, six hundred forty-two thousand, five hundred seventy-seven".