1561121483 has 2 divisors, whose sum is σ = 1561121484. Its totient is φ = 1561121482.

The previous prime is 1561121477. The next prime is 1561121557. The reversal of 1561121483 is 3841211651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1561121483 - 2⁸ = 1561121227 is a prime.

It is not a weakly prime, because it can be changed into another prime (1561121473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780560741 + 780560742.

It is an arithmetic number, because the mean of its divisors is an integer number (780560742).

Almost surely, 2^1561121483 is an apocalyptic number.

1561121483 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561121483 is an equidigital number, since it uses as much as digits as its factorization.

1561121483 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 32.

The square root of 1561121483 is about 39511.0298903990. The cubic root of 1561121483 is about 1160.0558541774.

The spelling of 1561121483 in words is "one billion, five hundred sixty-one million, one hundred twenty-one thousand, four hundred eighty-three".