1640554532 has 6 divisors (see below), whose sum is σ = 2870970438. Its totient is φ = 820277264.

The previous prime is 1640554499. The next prime is 1640554541. The reversal of 1640554532 is 2354550461.

It can be written as a sum of positive squares in only one way, i.e., 1513676836 + 126877696 = 38906^2 + 11264^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1640554492 and 1640554501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205069313 + ... + 205069320.

It is an arithmetic number, because the mean of its divisors is an integer number (478495073).

Almost surely, 2^1640554532 is an apocalyptic number.

It is an amenable number.

1640554532 is a deficient number, since it is larger than the sum of its proper divisors (1230415906).

1640554532 is a wasteful number, since it uses less digits than its factorization.

1640554532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410138637 (or 410138635 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 1640554532 is about 40503.7594798310. The cubic root of 1640554532 is about 1179.4066086680.

The spelling of 1640554532 in words is "one billion, six hundred forty million, five hundred fifty-four thousand, five hundred thirty-two".