3506859821756 has 12 divisors (see below), whose sum is σ = 6498004963968. Its totient is φ = 1650286974912.

The previous prime is 3506859821719. The next prime is 3506859821761. The reversal of 3506859821756 is 6571289586053.

It is a junction number, because it is equal to n+sod(n) for n = 3506859821692 and 3506859821701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25785733916 + ... + 25785734051.

It is an arithmetic number, because the mean of its divisors is an integer number (541500413664).

Almost surely, 2^{3506859821756} is an apocalyptic number.

It is an amenable number.

3506859821756 is a deficient number, since it is larger than the sum of its proper divisors (2991145142212).

3506859821756 is a wasteful number, since it uses less digits than its factorization.

3506859821756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51571467988 (or 51571467986 counting only the distinct ones).

The product of its (nonzero) digits is 108864000, while the sum is 65.

The spelling of 3506859821756 in words is "three trillion, five hundred six billion, eight hundred fifty-nine million, eight hundred twenty-one thousand, seven hundred fifty-six".