1635661052 has 24 divisors (see below), whose sum is σ = 3104710560. Its totient is φ = 750947840.

The previous prime is 1635661051. The next prime is 1635661061. The reversal of 1635661052 is 2501665361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1635661051) 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, 290552 + ... + 296127.

It is an arithmetic number, because the mean of its divisors is an integer number (129362940).

Almost surely, 2^1635661052 is an apocalyptic number.

It is an amenable number.

1635661052 is a deficient number, since it is larger than the sum of its proper divisors (1469049508).

1635661052 is a wasteful number, since it uses less digits than its factorization.

1635661052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586741 (or 586739 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1635661052 is about 40443.3066402835. The cubic root of 1635661052 is about 1178.2327879832.

The spelling of 1635661052 in words is "one billion, six hundred thirty-five million, six hundred sixty-one thousand, fifty-two".