9919451505 has 64 divisors (see below), whose sum is σ = 17014579200. Its totient is φ = 4933697472.

The previous prime is 9919451501. The next prime is 9919451527. The reversal of 9919451505 is 5051549199.

9919451505 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9919451505 - 2² = 9919451501 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9919451501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6892576 + ... + 6894014.

It is an arithmetic number, because the mean of its divisors is an integer number (265852800).

Almost surely, 2^9919451505 is an apocalyptic number.

9919451505 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9919451505 is a deficient number, since it is larger than the sum of its proper divisors (7095127695).

9919451505 is a wasteful number, since it uses less digits than its factorization.

9919451505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571 (or 1533 counting only the distinct ones).

The product of its (nonzero) digits is 364500, while the sum is 48.

The square root of 9919451505 is about 99596.4432346858. The cubic root of 9919451505 is about 2148.6345398696.

The spelling of 9919451505 in words is "nine billion, nine hundred nineteen million, four hundred fifty-one thousand, five hundred five".