15561464504006 has 4 divisors (see below), whose sum is σ = 23342196756012. Its totient is φ = 7780732252002.

The previous prime is 15561464503951. The next prime is 15561464504021. The reversal of 15561464504006 is 60040546416551.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3890366126000 + ... + 3890366126003.

It is an arithmetic number, because the mean of its divisors is an integer number (5835549189003).

Almost surely, 2^{15561464504006} is an apocalyptic number.

15561464504006 is a deficient number, since it is larger than the sum of its proper divisors (7780732252006).

15561464504006 is an equidigital number, since it uses as much as digits as its factorization.

15561464504006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7780732252005.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 15561464504006 in words is "fifteen trillion, five hundred sixty-one billion, four hundred sixty-four million, five hundred four thousand, six".