8456437120521 has 8 divisors (see below), whose sum is σ = 12142576378240. Its totient is φ = 5203961304912.

The previous prime is 8456437120511. The next prime is 8456437120561. The reversal of 8456437120521 is 1250217346548.

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

It is not a de Polignac number, because 8456437120521 - 2¹⁷ = 8456436989449 is a prime.

It is a super-2 number, since 2×8456437120521² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8456437120511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108415860481 + ... + 108415860558.

It is an arithmetic number, because the mean of its divisors is an integer number (1517822047280).

Almost surely, 2^{8456437120521} is an apocalyptic number.

It is an amenable number.

8456437120521 is a deficient number, since it is larger than the sum of its proper divisors (3686139257719).

8456437120521 is a wasteful number, since it uses less digits than its factorization.

8456437120521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216831721055.

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 8456437120521 in words is "eight trillion, four hundred fifty-six billion, four hundred thirty-seven million, one hundred twenty thousand, five hundred twenty-one".