1506500561 has 8 divisors (see below), whose sum is σ = 1529722560. Its totient is φ = 1483300368.

The previous prime is 1506500551. The next prime is 1506500573. The reversal of 1506500561 is 1650056051.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1506500561 - 2²² = 1502306257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1506500551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183380 + ... + 191418.

It is an arithmetic number, because the mean of its divisors is an integer number (191215320).

Almost surely, 2^1506500561 is an apocalyptic number.

It is an amenable number.

1506500561 is a deficient number, since it is larger than the sum of its proper divisors (23221999).

1506500561 is an equidigital number, since it uses as much as digits as its factorization.

1506500561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10903.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1506500561 is about 38813.6646169877. The cubic root of 1506500561 is about 1146.3654783571.

The spelling of 1506500561 in words is "one billion, five hundred six million, five hundred thousand, five hundred sixty-one".