1561560463 has 2 divisors, whose sum is σ = 1561560464. Its totient is φ = 1561560462.

The previous prime is 1561560457. The next prime is 1561560529. The reversal of 1561560463 is 3640651651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1561560463 - 2⁵ = 1561560431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1561564463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780780231 + 780780232.

It is an arithmetic number, because the mean of its divisors is an integer number (780780232).

Almost surely, 2^1561560463 is an apocalyptic number.

1561560463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561560463 is an equidigital number, since it uses as much as digits as its factorization.

1561560463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 1561560463 is about 39516.5846575840. The cubic root of 1561560463 is about 1160.1645780659.

The spelling of 1561560463 in words is "one billion, five hundred sixty-one million, five hundred sixty thousand, four hundred sixty-three".