9916557215503 has 4 divisors (see below), whose sum is σ = 9916596222040. Its totient is φ = 9916518208968.

The previous prime is 9916557215447. The next prime is 9916557215531. The reversal of 9916557215503 is 3055127556199.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9916557215503 is a prime.

It is a super-2 number, since 2×9916557215503² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9916557215573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19119408 + ... + 19631221.

It is an arithmetic number, because the mean of its divisors is an integer number (2479149055510).

Almost surely, 2^{9916557215503} is an apocalyptic number.

9916557215503 is a deficient number, since it is larger than the sum of its proper divisors (39006537).

9916557215503 is a wasteful number, since it uses less digits than its factorization.

9916557215503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39006536.

The product of its (nonzero) digits is 12757500, while the sum is 58.

The spelling of 9916557215503 in words is "nine trillion, nine hundred sixteen billion, five hundred fifty-seven million, two hundred fifteen thousand, five hundred three".