1656813378 has 16 divisors (see below), whose sum is σ = 3614865696. Its totient is φ = 502064640.

The previous prime is 1656813377. The next prime is 1656813437. The reversal of 1656813378 is 8733186561.

It is not an unprimeable number, because it can be changed into a prime (1656813377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12551551 + ... + 12551682.

It is an arithmetic number, because the mean of its divisors is an integer number (225929106).

Almost surely, 2^1656813378 is an apocalyptic number.

1656813378 is an abundant number, since it is smaller than the sum of its proper divisors (1958052318).

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

1656813378 is a wasteful number, since it uses less digits than its factorization.

1656813378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25103249.

The product of its digits is 725760, while the sum is 48.

The square root of 1656813378 is about 40703.9725088351. The cubic root of 1656813378 is about 1183.2900088262.

The spelling of 1656813378 in words is "one billion, six hundred fifty-six million, eight hundred thirteen thousand, three hundred seventy-eight".