1561541552 has 10 divisors (see below), whose sum is σ = 3025486788. Its totient is φ = 780770768.

The previous prime is 1561541551. The next prime is 1561541557. The reversal of 1561541552 is 2551451651.

It is not an unprimeable number, because it can be changed into a prime (1561541551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48798158 + ... + 48798189.

Almost surely, 2^1561541552 is an apocalyptic number.

It is an amenable number.

1561541552 is a deficient number, since it is larger than the sum of its proper divisors (1463945236).

1561541552 is an equidigital number, since it uses as much as digits as its factorization.

1561541552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97596355 (or 97596349 counting only the distinct ones).

The product of its digits is 30000, while the sum is 35.

The square root of 1561541552 is about 39516.3453775776. The cubic root of 1561541552 is about 1160.1598947248.

The spelling of 1561541552 in words is "one billion, five hundred sixty-one million, five hundred forty-one thousand, five hundred fifty-two".