357444388921 has 8 divisors (see below), whose sum is σ = 363762929160. Its totient is φ = 351177011328.

The previous prime is 357444388879. The next prime is 357444388927. The reversal of 357444388921 is 129883444753.

It can be written as a sum of positive squares in 4 ways, for example, as 20603444521 + 336840944400 = 143539^2 + 580380^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 357444388921 - 2⁷ = 357444388793 is a prime.

It is a super-2 number, since 2×357444388921² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (357444388927) 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, 12776566 + ... + 12804511.

It is an arithmetic number, because the mean of its divisors is an integer number (45470366145).

Almost surely, 2^357444388921 is an apocalyptic number.

It is an amenable number.

357444388921 is a deficient number, since it is larger than the sum of its proper divisors (6318540239).

357444388921 is a wasteful number, since it uses less digits than its factorization.

357444388921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25581323.

The product of its digits is 23224320, while the sum is 58.

The spelling of 357444388921 in words is "three hundred fifty-seven billion, four hundred forty-four million, three hundred eighty-eight thousand, nine hundred twenty-one".