8421955842357 has 24 divisors (see below), whose sum is σ = 12217644077184. Its totient is φ = 5590363331904.

The previous prime is 8421955842353. The next prime is 8421955842359. The reversal of 8421955842357 is 7532485591248.

It is a happy number.

8421955842357 is a `hidden beast` number, since 8 + 4 + 2 + 1 + 9 + 558 + 4 + 23 + 57 = 666.

It is not a de Polignac number, because 8421955842357 - 2² = 8421955842353 is a prime.

It is a super-2 number, since 2×8421955842357² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 8421955842294 and 8421955842303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421955842353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125205508 + ... + 125272754.

It is an arithmetic number, because the mean of its divisors is an integer number (509068503216).

Almost surely, 2^{8421955842357} is an apocalyptic number.

It is an amenable number.

8421955842357 is a deficient number, since it is larger than the sum of its proper divisors (3795688234827).

8421955842357 is a wasteful number, since it uses less digits than its factorization.

8421955842357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127209 (or 127206 counting only the distinct ones).

The product of its digits is 96768000, while the sum is 63.

The spelling of 8421955842357 in words is "eight trillion, four hundred twenty-one billion, nine hundred fifty-five million, eight hundred forty-two thousand, three hundred fifty-seven".