2012770645 has 4 divisors (see below), whose sum is σ = 2415324780. Its totient is φ = 1610216512.

The previous prime is 2012770633. The next prime is 2012770649. The reversal of 2012770645 is 5460772102.

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 1308558276 + 704212369 = 36174^2 + 26537^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2012770645 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2012770645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012770649) 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 3 ways as a sum of consecutive naturals, for example, 201277060 + ... + 201277069.

It is an arithmetic number, because the mean of its divisors is an integer number (603831195).

Almost surely, 2^2012770645 is an apocalyptic number.

It is an amenable number.

2012770645 is a deficient number, since it is larger than the sum of its proper divisors (402554135).

2012770645 is an equidigital number, since it uses as much as digits as its factorization.

2012770645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402554134.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 2012770645 is about 44863.9125021436. The cubic root of 2012770645 is about 1262.5970296958.

The spelling of 2012770645 in words is "two billion, twelve million, seven hundred seventy thousand, six hundred forty-five".