1650813738 has 16 divisors (see below), whose sum is σ = 3773288640. Its totient is φ = 471661056.

The previous prime is 1650813701. The next prime is 1650813739. The reversal of 1650813738 is 8373180561.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 39305089 = 1650813738 / (1 + 6 + 5 + 0 + 8 + 1 + 3 + 7 + 3 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 1650813738.

It is not an unprimeable number, because it can be changed into a prime (1650813739) 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, 19652503 + ... + 19652586.

It is an arithmetic number, because the mean of its divisors is an integer number (235830540).

Almost surely, 2^1650813738 is an apocalyptic number.

1650813738 is an abundant number, since it is smaller than the sum of its proper divisors (2122474902).

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

1650813738 is a wasteful number, since it uses less digits than its factorization.

1650813738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39305101.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1650813738 is about 40630.2072108918. The cubic root of 1650813738 is about 1181.8599743654.

The spelling of 1650813738 in words is "one billion, six hundred fifty million, eight hundred thirteen thousand, seven hundred thirty-eight".