197064655551 has 12 divisors (see below), whose sum is σ = 285756533712. Its totient is φ = 130865243136.

The previous prime is 197064655511. The next prime is 197064655589. The reversal of 197064655551 is 155556460791.

It is a happy number.

197064655551 is a `hidden beast` number, since 19 + 70 + 6 + 4 + 6 + 5 + 5 + 551 = 666.

It is not a de Polignac number, because 197064655551 - 2¹¹ = 197064653503 is a prime.

It is a super-2 number, since 2×197064655551² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197064655511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42597051 + ... + 42601676.

It is an arithmetic number, because the mean of its divisors is an integer number (23813044476).

Almost surely, 2^197064655551 is an apocalyptic number.

197064655551 is a deficient number, since it is larger than the sum of its proper divisors (88691878161).

197064655551 is a wasteful number, since it uses less digits than its factorization.

197064655551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85198990 (or 85198987 counting only the distinct ones).

The product of its (nonzero) digits is 5670000, while the sum is 54.

The spelling of 197064655551 in words is "one hundred ninety-seven billion, sixty-four million, six hundred fifty-five thousand, five hundred fifty-one".