15655506506 has 4 divisors (see below), whose sum is σ = 23483259762. Its totient is φ = 7827753252.

The previous prime is 15655506469. The next prime is 15655506539. The reversal of 15655506506 is 60560555651.

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

It can be written as a sum of positive squares in only one way, i.e., 14784371281 + 871135225 = 121591^2 + 29515^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3913876625 + ... + 3913876628.

Almost surely, 2^15655506506 is an apocalyptic number.

15655506506 is a deficient number, since it is larger than the sum of its proper divisors (7827753256).

15655506506 is an equidigital number, since it uses as much as digits as its factorization.

15655506506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7827753255.

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 15655506506 in words is "fifteen billion, six hundred fifty-five million, five hundred six thousand, five hundred six".