1561760652 has 12 divisors (see below), whose sum is σ = 3644108216. Its totient is φ = 520586880.

The previous prime is 1561760633. The next prime is 1561760657. The reversal of 1561760652 is 2560671651.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1561760652.

It is not an unprimeable number, because it can be changed into a prime (1561760657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65073349 + ... + 65073372.

Almost surely, 2^1561760652 is an apocalyptic number.

1561760652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1561760652 is an abundant number, since it is smaller than the sum of its proper divisors (2082347564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1561760652 is a wasteful number, since it uses less digits than its factorization.

1561760652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130146728 (or 130146726 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 1561760652 is about 39519.1175508766. The cubic root of 1561760652 is about 1160.2141528915.

The spelling of 1561760652 in words is "one billion, five hundred sixty-one million, seven hundred sixty thousand, six hundred fifty-two".