155561463 has 12 divisors (see below), whose sum is σ = 224808168. Its totient is φ = 103657680.

The previous prime is 155561459. The next prime is 155561479. The reversal of 155561463 is 364165551.

155561463 is a `hidden beast` number, since 1 + 55 + 561 + 46 + 3 = 666.

It is not a de Polignac number, because 155561463 - 2² = 155561459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155561453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33181 + ... + 37577.

It is an arithmetic number, because the mean of its divisors is an integer number (18734014).

Almost surely, 2^155561463 is an apocalyptic number.

155561463 is a deficient number, since it is larger than the sum of its proper divisors (69246705).

155561463 is a wasteful number, since it uses less digits than its factorization.

155561463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8334 (or 8331 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 155561463 is about 12472.4281116389. The cubic root of 155561463 is about 537.8163566173.

The spelling of 155561463 in words is "one hundred fifty-five million, five hundred sixty-one thousand, four hundred sixty-three".