4945391266 has 16 divisors (see below), whose sum is σ = 7505681400. Its totient is φ = 2443529088.

The previous prime is 4945391263. The next prime is 4945391267. The reversal of 4945391266 is 6621935494.

It can be written as a sum of positive squares in 4 ways, for example, as 4811503225 + 133888041 = 69365^2 + 11571^2 .

It is not an unprimeable number, because it can be changed into a prime (4945391263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354316 + ... + 368008.

Almost surely, 2^4945391266 is an apocalyptic number.

4945391266 is a deficient number, since it is larger than the sum of its proper divisors (2560290134).

4945391266 is a wasteful number, since it uses less digits than its factorization.

4945391266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15813.

The product of its digits is 1399680, while the sum is 49.

The square root of 4945391266 is about 70323.4759237625. The cubic root of 4945391266 is about 1703.7278362977.

The spelling of 4945391266 in words is "four billion, nine hundred forty-five million, three hundred ninety-one thousand, two hundred sixty-six".