15486520661 has 2 divisors, whose sum is σ = 15486520662. Its totient is φ = 15486520660.

The previous prime is 15486520657. The next prime is 15486520723. The reversal of 15486520661 is 16602568451.

15486520661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11619546436 + 3866974225 = 107794^2 + 62185^2 .

It is a cyclic number.

It is not a de Polignac number, because 15486520661 - 2² = 15486520657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15486520601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7743260330 + 7743260331.

It is an arithmetic number, because the mean of its divisors is an integer number (7743260331).

Almost surely, 2^15486520661 is an apocalyptic number.

It is an amenable number.

15486520661 is a deficient number, since it is larger than the sum of its proper divisors (1).

15486520661 is an equidigital number, since it uses as much as digits as its factorization.

15486520661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 15486520661 in words is "fifteen billion, four hundred eighty-six million, five hundred twenty thousand, six hundred sixty-one".