1197494678601 has 135 divisors (see below), whose sum is σ = 1989124666551. Its totient is φ = 717616332576.

The previous prime is 1197494678593. The next prime is 1197494678617. The reversal of 1197494678601 is 1068764947911.

The square root of 1197494678601 is 1094301.

It is a perfect power (a square), and thus also a powerful number.

1197494678601 is a `hidden beast` number, since 1 + 1 + 9 + 7 + 494 + 67 + 86 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 177144183225 + 1020350495376 = 420885^2 + 1010124^2 .

It is not a de Polignac number, because 1197494678601 - 2³ = 1197494678593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1197494678641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 6017561100 + ... + 6017561298.

Almost surely, 2^{1197494678601} is an apocalyptic number.

1197494678601 is the 1094301-st square number.

1197494678601 is the 547151-st centered octagonal number.

It is an amenable number.

1197494678601 is a deficient number, since it is larger than the sum of its proper divisors (791629987950).

1197494678601 is an frugal number, since it uses more digits than its factorization.

1197494678601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 1197494678601 in words is "one trillion, one hundred ninety-seven billion, four hundred ninety-four million, six hundred seventy-eight thousand, six hundred one".