1640552212 has 12 divisors (see below), whose sum is σ = 3091810036. Its totient is φ = 757177920.

The previous prime is 1640552149. The next prime is 1640552227. The reversal of 1640552212 is 2122550461.

It can be written as a sum of positive squares in 2 ways, for example, as 874148356 + 766403856 = 29566^2 + 27684^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15774489 + ... + 15774592.

Almost surely, 2^1640552212 is an apocalyptic number.

It is an amenable number.

1640552212 is a deficient number, since it is larger than the sum of its proper divisors (1451257824).

1640552212 is a wasteful number, since it uses less digits than its factorization.

1640552212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31549098 (or 31549096 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1640552212 is about 40503.7308405041. The cubic root of 1640552212 is about 1179.4060527128.

The spelling of 1640552212 in words is "one billion, six hundred forty million, five hundred fifty-two thousand, two hundred twelve".