15417916649 has 2 divisors, whose sum is σ = 15417916650. Its totient is φ = 15417916648.

The previous prime is 15417916561. The next prime is 15417916667. The reversal of 15417916649 is 94661971451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12569773225 + 2848143424 = 112115^2 + 53368^2 .

It is an emirp because it is prime and its reverse (94661971451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15417916649 - 2²⁰ = 15416868073 is a prime.

It is a super-2 number, since 2×15417916649² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15417916649.

It is not a weakly prime, because it can be changed into another prime (15417916249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7708958324 + 7708958325.

It is an arithmetic number, because the mean of its divisors is an integer number (7708958325).

Almost surely, 2^15417916649 is an apocalyptic number.

It is an amenable number.

15417916649 is a deficient number, since it is larger than the sum of its proper divisors (1).

15417916649 is an equidigital number, since it uses as much as digits as its factorization.

15417916649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 53.

The spelling of 15417916649 in words is "fifteen billion, four hundred seventeen million, nine hundred sixteen thousand, six hundred forty-nine".