15605501015651 has 2 divisors, whose sum is σ = 15605501015652. Its totient is φ = 15605501015650.

The previous prime is 15605501015647. The next prime is 15605501015707. The reversal of 15605501015651 is 15651010550651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15605501015651 - 2² = 15605501015647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15605501015599 and 15605501015608.

It is not a weakly prime, because it can be changed into another prime (15605501014651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7802750507825 + 7802750507826.

It is an arithmetic number, because the mean of its divisors is an integer number (7802750507826).

Almost surely, 2^{15605501015651} is an apocalyptic number.

15605501015651 is a deficient number, since it is larger than the sum of its proper divisors (1).

15605501015651 is an equidigital number, since it uses as much as digits as its factorization.

15605501015651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112500, while the sum is 41.

The spelling of 15605501015651 in words is "fifteen trillion, six hundred five billion, five hundred one million, fifteen thousand, six hundred fifty-one".