1651117938 has 16 divisors (see below), whose sum is σ = 3316658880. Its totient is φ = 547968816.

The previous prime is 1651117931. The next prime is 1651117967. The reversal of 1651117938 is 8397111561.

It is a self number, because there is not a number n which added to its sum of digits gives 1651117938.

It is not an unprimeable number, because it can be changed into a prime (1651117931) 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, 599470 + ... + 602217.

It is an arithmetic number, because the mean of its divisors is an integer number (207291180).

Almost surely, 2^1651117938 is an apocalyptic number.

1651117938 is an abundant number, since it is smaller than the sum of its proper divisors (1665540942).

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

1651117938 is a wasteful number, since it uses less digits than its factorization.

1651117938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201921.

The product of its digits is 45360, while the sum is 42.

The square root of 1651117938 is about 40633.9505586154. The cubic root of 1651117938 is about 1181.9325647723.

The spelling of 1651117938 in words is "one billion, six hundred fifty-one million, one hundred seventeen thousand, nine hundred thirty-eight".