9964715555 has 4 divisors (see below), whose sum is σ = 11957658672. Its totient is φ = 7971772440.

The previous prime is 9964715531. The next prime is 9964715557. The reversal of 9964715555 is 5555174699.

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

It is not a de Polignac number, because 9964715555 - 2¹⁰ = 9964714531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9964715555.

It is not an unprimeable number, because it can be changed into a prime (9964715557) 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, 996471551 + ... + 996471560.

It is an arithmetic number, because the mean of its divisors is an integer number (2989414668).

Almost surely, 2^9964715555 is an apocalyptic number.

9964715555 is a deficient number, since it is larger than the sum of its proper divisors (1992943117).

9964715555 is a wasteful number, since it uses less digits than its factorization.

9964715555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992943116.

The product of its digits is 8505000, while the sum is 56.

The square root of 9964715555 is about 99823.4218758303. The cubic root of 9964715555 is about 2151.8977694828.

The spelling of 9964715555 in words is "nine billion, nine hundred sixty-four million, seven hundred fifteen thousand, five hundred fifty-five".