1661563352 has 32 divisors (see below), whose sum is σ = 3248294400. Its totient is φ = 795803904.

The previous prime is 1661563333. The next prime is 1661563361. The reversal of 1661563352 is 2533651661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1268 + ... + 57660.

It is an arithmetic number, because the mean of its divisors is an integer number (101509200).

Almost surely, 2^1661563352 is an apocalyptic number.

It is an amenable number.

1661563352 is a deficient number, since it is larger than the sum of its proper divisors (1586731048).

1661563352 is a wasteful number, since it uses less digits than its factorization.

1661563352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56555 (or 56551 counting only the distinct ones).

The product of its digits is 97200, while the sum is 38.

The square root of 1661563352 is about 40762.2785427900. The cubic root of 1661563352 is about 1184.4197345388.

The spelling of 1661563352 in words is "one billion, six hundred sixty-one million, five hundred sixty-three thousand, three hundred fifty-two".