1640073722 has 16 divisors (see below), whose sum is σ = 2812268160. Its totient is φ = 702710448.

The previous prime is 1640073713. The next prime is 1640073727. The reversal of 1640073722 is 2273700461.

It is not an unprimeable number, because it can be changed into a prime (1640073727) 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, 52988 + ... + 78024.

It is an arithmetic number, because the mean of its divisors is an integer number (175766760).

Almost surely, 2^1640073722 is an apocalyptic number.

1640073722 is a deficient number, since it is larger than the sum of its proper divisors (1172194438).

1640073722 is a wasteful number, since it uses less digits than its factorization.

1640073722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29725.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 1640073722 is about 40497.8236699208. The cubic root of 1640073722 is about 1179.2913781391.

The spelling of 1640073722 in words is "one billion, six hundred forty million, seventy-three thousand, seven hundred twenty-two".