820107448477 has 8 divisors (see below), whose sum is σ = 821073856064. Its totient is φ = 819141376608.

The previous prime is 820107448471. The next prime is 820107448483. The reversal of 820107448477 is 774844701028.

It is an interprime number because it is at equal distance from previous prime (820107448471) and next prime (820107448483).

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 820107448477 - 2¹¹ = 820107446429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820107448471) 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, 4983838 + ... + 5145760.

It is an arithmetic number, because the mean of its divisors is an integer number (102634232008).

Almost surely, 2^820107448477 is an apocalyptic number.

It is an amenable number.

820107448477 is a deficient number, since it is larger than the sum of its proper divisors (966407587).

820107448477 is a wasteful number, since it uses less digits than its factorization.

820107448477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167859.

The product of its (nonzero) digits is 2809856, while the sum is 52.

The spelling of 820107448477 in words is "eight hundred twenty billion, one hundred seven million, four hundred forty-eight thousand, four hundred seventy-seven".