561153505 has 16 divisors (see below), whose sum is σ = 773265600. Its totient is φ = 386631360.

The previous prime is 561153503. The next prime is 561153521. The reversal of 561153505 is 505351165.

It is not a de Polignac number, because 561153505 - 2¹ = 561153503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561153503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267450 + ... + 269539.

It is an arithmetic number, because the mean of its divisors is an integer number (48329100).

Almost surely, 2^561153505 is an apocalyptic number.

561153505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

561153505 is a deficient number, since it is larger than the sum of its proper divisors (212112095).

561153505 is a wasteful number, since it uses less digits than its factorization.

561153505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537024.

The product of its (nonzero) digits is 11250, while the sum is 31.

The square root of 561153505 is about 23688.6788361023. The cubic root of 561153505 is about 824.8226150615.

The spelling of 561153505 in words is "five hundred sixty-one million, one hundred fifty-three thousand, five hundred five".