11197445997 has 32 divisors (see below), whose sum is σ = 16059479040. Its totient is φ = 6918912000.

The previous prime is 11197445929. The next prime is 11197446031. The reversal of 11197445997 is 79954479111.

It is not a de Polignac number, because 11197445997 - 2²³ = 11189057389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11197447997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 519597 + ... + 540717.

It is an arithmetic number, because the mean of its divisors is an integer number (501858720).

Almost surely, 2^11197445997 is an apocalyptic number.

It is an amenable number.

11197445997 is a deficient number, since it is larger than the sum of its proper divisors (4862033043).

11197445997 is a wasteful number, since it uses less digits than its factorization.

11197445997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21345.

The product of its digits is 2857680, while the sum is 57.

The spelling of 11197445997 in words is "eleven billion, one hundred ninety-seven million, four hundred forty-five thousand, nine hundred ninety-seven".