8477421857081 has 4 divisors (see below), whose sum is σ = 8482697167872. Its totient is φ = 8472146546292.

The previous prime is 8477421857071. The next prime is 8477421857089. The reversal of 8477421857081 is 1807581247748.

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 8477421857081 - 2¹⁴ = 8477421840697 is a prime.

It is a super-2 number, since 2×8477421857081² (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 (8477421857089) 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, 2637652985 + ... + 2637656198.

It is an arithmetic number, because the mean of its divisors is an integer number (2120674291968).

Almost surely, 2^{8477421857081} is an apocalyptic number.

It is an amenable number.

8477421857081 is a deficient number, since it is larger than the sum of its proper divisors (5275310791).

8477421857081 is a wasteful number, since it uses less digits than its factorization.

8477421857081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5275310790.

The product of its (nonzero) digits is 28098560, while the sum is 62.

The spelling of 8477421857081 in words is "eight trillion, four hundred seventy-seven billion, four hundred twenty-one million, eight hundred fifty-seven thousand, eighty-one".