991076616 has 96 divisors (see below), whose sum is σ = 2737832760. Its totient is φ = 323813376.

The previous prime is 991076579. The next prime is 991076617. The reversal of 991076616 is 616670199.

It can be written as a sum of positive squares in 4 ways, for example, as 939667716 + 51408900 = 30654^2 + 7170^2 .

It is a super-2 number, since 2×991076616² = 1964465717564022912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (991076617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1013920 + ... + 1014896.

Almost surely, 2^991076616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 991076616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1368916380).

991076616 is an abundant number, since it is smaller than the sum of its proper divisors (1746756144).

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

991076616 is a wasteful number, since it uses less digits than its factorization.

991076616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 991076616 is about 31481.3693475999. The cubic root of 991076616 is about 997.0166471233.

The spelling of 991076616 in words is "nine hundred ninety-one million, seventy-six thousand, six hundred sixteen".