1191948616 has 8 divisors (see below), whose sum is σ = 2234903670. Its totient is φ = 595974304.

The previous prime is 1191948613. The next prime is 1191948629. The reversal of 1191948616 is 6168491911.

It can be written as a sum of positive squares in only one way, i.e., 1046263716 + 145684900 = 32346^2 + 12070^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1191948613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74496781 + ... + 74496796.

Almost surely, 2^1191948616 is an apocalyptic number.

It is an amenable number.

1191948616 is a deficient number, since it is larger than the sum of its proper divisors (1042955054).

1191948616 is a wasteful number, since it uses less digits than its factorization.

1191948616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148993583 (or 148993579 counting only the distinct ones).

The product of its digits is 93312, while the sum is 46.

The square root of 1191948616 is about 34524.6088464446. The cubic root of 1191948616 is about 1060.2766027886.

The spelling of 1191948616 in words is "one billion, one hundred ninety-one million, nine hundred forty-eight thousand, six hundred sixteen".