1630646809855 has 32 divisors (see below), whose sum is σ = 2333687583744. Its totient is φ = 1069477702656.

The previous prime is 1630646809849. The next prime is 1630646809931. The reversal of 1630646809855 is 5589086460361.

It is a cyclic number.

It is not a de Polignac number, because 1630646809855 - 2⁵ = 1630646809823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1630646809793 and 1630646809802.

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, 15857967 + ... + 15960463.

It is an arithmetic number, because the mean of its divisors is an integer number (72927736992).

Almost surely, 2^{1630646809855} is an apocalyptic number.

1630646809855 is a deficient number, since it is larger than the sum of its proper divisors (703040773889).

1630646809855 is a wasteful number, since it uses less digits than its factorization.

1630646809855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122295.

The product of its (nonzero) digits is 37324800, while the sum is 61.

The spelling of 1630646809855 in words is "one trillion, six hundred thirty billion, six hundred forty-six million, eight hundred nine thousand, eight hundred fifty-five".