197844266613 has 16 divisors (see below), whose sum is σ = 306419225216. Its totient is φ = 111200523840.

The previous prime is 197844266551. The next prime is 197844266621. The reversal of 197844266613 is 316662448791.

It is not a de Polignac number, because 197844266613 - 2¹⁸ = 197844004469 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 (197844266693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77221306 + ... + 77223867.

It is an arithmetic number, because the mean of its divisors is an integer number (19151201576).

Almost surely, 2^197844266613 is an apocalyptic number.

It is an amenable number.

197844266613 is a deficient number, since it is larger than the sum of its proper divisors (108574958603).

197844266613 is a wasteful number, since it uses less digits than its factorization.

197844266613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154445244.

The product of its digits is 10450944, while the sum is 57.

The spelling of 197844266613 in words is "one hundred ninety-seven billion, eight hundred forty-four million, two hundred sixty-six thousand, six hundred thirteen".