397261133591 has 16 divisors (see below), whose sum is σ = 469689753600. Its totient is φ = 328752842208.

The previous prime is 397261133573. The next prime is 397261133629. The reversal of 397261133591 is 195331162793.

It is not a de Polignac number, because 397261133591 - 2³⁰ = 396187391767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397261133551) 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, 7847720 + ... + 7898178.

It is an arithmetic number, because the mean of its divisors is an integer number (29355609600).

Almost surely, 2^397261133591 is an apocalyptic number.

397261133591 is a deficient number, since it is larger than the sum of its proper divisors (72428620009).

397261133591 is a wasteful number, since it uses less digits than its factorization.

397261133591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89278.

The product of its digits is 918540, while the sum is 50.

The spelling of 397261133591 in words is "three hundred ninety-seven billion, two hundred sixty-one million, one hundred thirty-three thousand, five hundred ninety-one".