2155120630646 has 8 divisors (see below), whose sum is σ = 3232716410280. Its totient is φ = 1077548493888.

The previous prime is 2155120630639. The next prime is 2155120630669. The reversal of 2155120630646 is 6460360215512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 5681051 + ... + 6048518.

It is an arithmetic number, because the mean of its divisors is an integer number (404089551285).

Almost surely, 2^{2155120630646} is an apocalyptic number.

2155120630646 is a deficient number, since it is larger than the sum of its proper divisors (1077595779634).

2155120630646 is a wasteful number, since it uses less digits than its factorization.

2155120630646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11821438.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 2155120630646 in words is "two trillion, one hundred fifty-five billion, one hundred twenty million, six hundred thirty thousand, six hundred forty-six".