1640712773 has 16 divisors (see below), whose sum is σ = 1926819840. Its totient is φ = 1367812656.

The previous prime is 1640712767. The next prime is 1640712779. The reversal of 1640712773 is 3772170461.

It is an interprime number because it is at equal distance from previous prime (1640712767) and next prime (1640712779).

It is not a de Polignac number, because 1640712773 - 2¹⁸ = 1640450629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640712779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60536 + ... + 83342.

It is an arithmetic number, because the mean of its divisors is an integer number (120426240).

Almost surely, 2^1640712773 is an apocalyptic number.

It is an amenable number.

1640712773 is a deficient number, since it is larger than the sum of its proper divisors (286107067).

1640712773 is a wasteful number, since it uses less digits than its factorization.

1640712773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23096.

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 1640712773 is about 40505.7128439928. The cubic root of 1640712773 is about 1179.4445276516. Note that the first 3 decimals are identical.

The spelling of 1640712773 in words is "one billion, six hundred forty million, seven hundred twelve thousand, seven hundred seventy-three".