820935667725 has 12 divisors (see below), whose sum is σ = 1357280304096. Its totient is φ = 437832356080.

The previous prime is 820935667711. The next prime is 820935667793. The reversal of 820935667725 is 527766539028.

It is not a de Polignac number, because 820935667725 - 2⁴ = 820935667709 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5472904377 + ... + 5472904526.

It is an arithmetic number, because the mean of its divisors is an integer number (113106692008).

Almost surely, 2^820935667725 is an apocalyptic number.

It is an amenable number.

820935667725 is a deficient number, since it is larger than the sum of its proper divisors (536344636371).

820935667725 is a wasteful number, since it uses less digits than its factorization.

820935667725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10945808916 (or 10945808911 counting only the distinct ones).

The product of its (nonzero) digits is 38102400, while the sum is 60.

The spelling of 820935667725 in words is "eight hundred twenty billion, nine hundred thirty-five million, six hundred sixty-seven thousand, seven hundred twenty-five".