11913157197 has 6 divisors (see below), whose sum is σ = 17207893742. Its totient is φ = 7942104792.

The previous prime is 11913157063. The next prime is 11913157253. The reversal of 11913157197 is 79175131911.

It can be written as a sum of positive squares in only one way, i.e., 10963346436 + 949810761 = 104706^2 + 30819^2 .

It is not a de Polignac number, because 11913157197 - 2¹² = 11913153101 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 (11913157297) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 661842058 + ... + 661842075.

Almost surely, 2^11913157197 is an apocalyptic number.

It is an amenable number.

11913157197 is a deficient number, since it is larger than the sum of its proper divisors (5294736545).

11913157197 is a wasteful number, since it uses less digits than its factorization.

11913157197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323684139 (or 1323684136 counting only the distinct ones).

The product of its digits is 59535, while the sum is 45.

The spelling of 11913157197 in words is "eleven billion, nine hundred thirteen million, one hundred fifty-seven thousand, one hundred ninety-seven".