397440143558 has 16 divisors (see below), whose sum is σ = 646624281744. Its totient is φ = 182468931840.

The previous prime is 397440143557. The next prime is 397440143561. The reversal of 397440143558 is 855341044793.

It is a super-2 number, since 2×397440143558² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397440143557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142552460 + ... + 142555247.

It is an arithmetic number, because the mean of its divisors is an integer number (40414017609).

Almost surely, 2^397440143558 is an apocalyptic number.

397440143558 is a deficient number, since it is larger than the sum of its proper divisors (249184138186).

397440143558 is a wasteful number, since it uses less digits than its factorization.

397440143558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285107767.

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 397440143558 in words is "three hundred ninety-seven billion, four hundred forty million, one hundred forty-three thousand, five hundred fifty-eight".