1640036266 has 16 divisors (see below), whose sum is σ = 2690402688. Its totient is φ = 743608000.

The previous prime is 1640036261. The next prime is 1640036309. The reversal of 1640036266 is 6626300461.

It is not an unprimeable number, because it can be changed into a prime (1640036261) 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, 84130 + ... + 101773.

It is an arithmetic number, because the mean of its divisors is an integer number (168150168).

Almost surely, 2^1640036266 is an apocalyptic number.

1640036266 is a deficient number, since it is larger than the sum of its proper divisors (1050366422).

1640036266 is a wasteful number, since it uses less digits than its factorization.

1640036266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186317.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 1640036266 is about 40497.3612226772. The cubic root of 1640036266 is about 1179.2824005195.

The spelling of 1640036266 in words is "one billion, six hundred forty million, thirty-six thousand, two hundred sixty-six".