9915379776 has 147 divisors (see below), whose sum is σ = 29564383213. Its totient is φ = 3297957120.

The previous prime is 9915379739. The next prime is 9915379811. The reversal of 9915379776 is 6779735199.

The square root of 9915379776 is 99576.

It is a perfect power (a square), and thus also a powerful number.

9915379776 is a `hidden beast` number, since 9 + 9 + 1 + 537 + 97 + 7 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3178253376 + 6737126400 = 56376^2 + 82080^2 .

It is a super-2 number, since 2×9915379776² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 21508186 + ... + 21508646.

Almost surely, 2^9915379776 is an apocalyptic number.

9915379776 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

9915379776 is the 99576-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9915379776

9915379776 is an abundant number, since it is smaller than the sum of its proper divisors (19649003437).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9915379776 is an frugal number, since it uses more digits than its factorization.

9915379776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 466 counting only the distinct ones).

The product of its digits is 22504230, while the sum is 63.

The cubic root of 9915379776 is about 2148.3405096710.

It can be divided in two parts, 99153 and 79776, that added together give a square (178929 = 423²).

The spelling of 9915379776 in words is "nine billion, nine hundred fifteen million, three hundred seventy-nine thousand, seven hundred seventy-six".