820339077125 has 32 divisors (see below), whose sum is σ = 1058593536000. Its totient is φ = 634028448000.

The previous prime is 820339077109. The next prime is 820339077167. The reversal of 820339077125 is 521770933028.

It is not a de Polignac number, because 820339077125 - 2⁴ = 820339077109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 820339077125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2119376 + ... + 2476374.

It is an arithmetic number, because the mean of its divisors is an integer number (33081048000).

Almost surely, 2^820339077125 is an apocalyptic number.

It is an amenable number.

820339077125 is a deficient number, since it is larger than the sum of its proper divisors (238254458875).

820339077125 is a wasteful number, since it uses less digits than its factorization.

820339077125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357638 (or 357628 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 820339077125 in words is "eight hundred twenty billion, three hundred thirty-nine million, seventy-seven thousand, one hundred twenty-five".