820616782843 has 12 divisors (see below), whose sum is σ = 971384903104. Its totient is φ = 688629466800.

The previous prime is 820616782831. The next prime is 820616782861. The reversal of 820616782843 is 348287616028.

It is not a de Polignac number, because 820616782843 - 2²¹ = 820614685691 is a prime.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (820616782243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 260842923 + ... + 260846068.

Almost surely, 2^820616782843 is an apocalyptic number.

820616782843 is a deficient number, since it is larger than the sum of its proper divisors (150768120261).

820616782843 is a wasteful number, since it uses less digits than its factorization.

820616782843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521689026 (or 521689015 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 55.

The spelling of 820616782843 in words is "eight hundred twenty billion, six hundred sixteen million, seven hundred eighty-two thousand, eight hundred forty-three".