397121493888 has 96 divisors (see below), whose sum is σ = 1306009701360. Its totient is φ = 113463281664.

The previous prime is 397121493877. The next prime is 397121493929. The reversal of 397121493888 is 888394121793.

397121493888 is a `hidden beast` number, since 3 + 97 + 121 + 49 + 388 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 24615045 + ... + 24631172.

Almost surely, 2^397121493888 is an apocalyptic number.

It is an amenable number.

397121493888 is an abundant number, since it is smaller than the sum of its proper divisors (908888207472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397121493888 is a wasteful number, since it uses less digits than its factorization.

397121493888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49246244 (or 49246229 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The spelling of 397121493888 in words is "three hundred ninety-seven billion, one hundred twenty-one million, four hundred ninety-three thousand, eight hundred eighty-eight".