11491505197 has 8 divisors (see below), whose sum is σ = 12097324800. Its totient is φ = 10885785984.

The previous prime is 11491505183. The next prime is 11491505219. The reversal of 11491505197 is 79150519411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11491505197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11491505117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367428 + ... + 397474.

It is an arithmetic number, because the mean of its divisors is an integer number (1512165600).

Almost surely, 2^11491505197 is an apocalyptic number.

It is an amenable number.

11491505197 is a deficient number, since it is larger than the sum of its proper divisors (605819603).

11491505197 is a wasteful number, since it uses less digits than its factorization.

11491505197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50195.

The product of its (nonzero) digits is 56700, while the sum is 43.

The spelling of 11491505197 in words is "eleven billion, four hundred ninety-one million, five hundred five thousand, one hundred ninety-seven".