1646938854 has 48 divisors (see below), whose sum is σ = 3966238224. Its totient is φ = 489652800.

The previous prime is 1646938849. The next prime is 1646938861. The reversal of 1646938854 is 4588396461.

It is a self number, because there is not a number n which added to its sum of digits gives 1646938854.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67977 + ... + 88964.

It is an arithmetic number, because the mean of its divisors is an integer number (82629963).

Almost surely, 2^1646938854 is an apocalyptic number.

1646938854 is an abundant number, since it is smaller than the sum of its proper divisors (2319299370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1646938854 is a wasteful number, since it uses less digits than its factorization.

1646938854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157013 (or 157010 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 1646938854 is about 40582.4944280166. The cubic root of 1646938854 is about 1180.9345402351.

The spelling of 1646938854 in words is "one billion, six hundred forty-six million, nine hundred thirty-eight thousand, eight hundred fifty-four".