15518979001 has 2 divisors, whose sum is σ = 15518979002. Its totient is φ = 15518979000.

The previous prime is 15518978987. The next prime is 15518979017. The reversal of 15518979001 is 10097981551.

15518979001 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., 9754525225 + 5764453776 = 98765^2 + 75924^2 .

It is a cyclic number.

It is not a de Polignac number, because 15518979001 - 2¹³ = 15518970809 is a prime.

It is not a weakly prime, because it can be changed into another prime (15518979031) 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, 7759489500 + 7759489501.

It is an arithmetic number, because the mean of its divisors is an integer number (7759489501).

Almost surely, 2^15518979001 is an apocalyptic number.

It is an amenable number.

15518979001 is a deficient number, since it is larger than the sum of its proper divisors (1).

15518979001 is an equidigital number, since it uses as much as digits as its factorization.

15518979001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 46.

The spelling of 15518979001 in words is "fifteen billion, five hundred eighteen million, nine hundred seventy-nine thousand, one".