15550623619 has 2 divisors, whose sum is σ = 15550623620. Its totient is φ = 15550623618.

The previous prime is 15550623581. The next prime is 15550623643. The reversal of 15550623619 is 91632605551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15550623619 - 2¹¹ = 15550621571 is a prime.

It is a super-2 number, since 2×15550623619² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15550623719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7775311809 + 7775311810.

It is an arithmetic number, because the mean of its divisors is an integer number (7775311810).

Almost surely, 2^15550623619 is an apocalyptic number.

15550623619 is a deficient number, since it is larger than the sum of its proper divisors (1).

15550623619 is an equidigital number, since it uses as much as digits as its factorization.

15550623619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243000, while the sum is 43.

The spelling of 15550623619 in words is "fifteen billion, five hundred fifty million, six hundred twenty-three thousand, six hundred nineteen".