1561282047 has 96 divisors (see below), whose sum is σ = 2641766400. Its totient is φ = 914924160.

The previous prime is 1561282043. The next prime is 1561282087. The reversal of 1561282047 is 7402821651.

1561282047 is a `hidden beast` number, since 15 + 612 + 8 + 20 + 4 + 7 = 666.

It is not a de Polignac number, because 1561282047 - 2² = 1561282043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561282043) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10478329 + ... + 10478477.

It is an arithmetic number, because the mean of its divisors is an integer number (27518400).

Almost surely, 2^1561282047 is an apocalyptic number.

1561282047 is a deficient number, since it is larger than the sum of its proper divisors (1080484353).

1561282047 is a wasteful number, since it uses less digits than its factorization.

1561282047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 1561282047 is about 39513.0617264722. The cubic root of 1561282047 is about 1160.0956240532.

The spelling of 1561282047 in words is "one billion, five hundred sixty-one million, two hundred eighty-two thousand, forty-seven".