83617145420857 has 4 divisors (see below), whose sum is σ = 83675906592640. Its totient is φ = 83558384249076.

The previous prime is 83617145420759. The next prime is 83617145420867. The reversal of 83617145420857 is 75802454171638.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83617145420857 - 2⁷ = 83617145420729 is a prime.

It is a super-2 number, since 2×83617145420857² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83617145420795 and 83617145420804.

It is not an unprimeable number, because it can be changed into a prime (83617145420867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29380583757 + ... + 29380586602.

It is an arithmetic number, because the mean of its divisors is an integer number (20918976648160).

Almost surely, 2^{83617145420857} is an apocalyptic number.

It is an amenable number.

83617145420857 is a deficient number, since it is larger than the sum of its proper divisors (58761171783).

83617145420857 is a wasteful number, since it uses less digits than its factorization.

83617145420857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58761171782.

The product of its (nonzero) digits is 45158400, while the sum is 61.

The spelling of 83617145420857 in words is "eighty-three trillion, six hundred seventeen billion, one hundred forty-five million, four hundred twenty thousand, eight hundred fifty-seven".