1640357050 has 12 divisors (see below), whose sum is σ = 3051064206. Its totient is φ = 656142800.

The previous prime is 1640357041. The next prime is 1640357051. The reversal of 1640357050 is 507530461.

It can be written as a sum of positive squares in 3 ways, for example, as 731756601 + 908600449 = 27051^2 + 30143^2 .

It is not an unprimeable number, because it can be changed into a prime (1640357051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16403521 + ... + 16403620.

Almost surely, 2^1640357050 is an apocalyptic number.

1640357050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1640357050 is a deficient number, since it is larger than the sum of its proper divisors (1410707156).

1640357050 is a wasteful number, since it uses less digits than its factorization.

1640357050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32807153 (or 32807148 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 1640357050 is about 40501.3215833755. The cubic root of 1640357050 is about 1179.3592830193.

The spelling of 1640357050 in words is "one billion, six hundred forty million, three hundred fifty-seven thousand, fifty".