1651145890 has 16 divisors (see below), whose sum is σ = 2999840832. Its totient is φ = 654285424.

The previous prime is 1651145887. The next prime is 1651145911. The reversal of 1651145890 is 985411561.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 770494 + ... + 772633.

It is an arithmetic number, because the mean of its divisors is an integer number (187490052).

Almost surely, 2^1651145890 is an apocalyptic number.

1651145890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1651145890 is a deficient number, since it is larger than the sum of its proper divisors (1348694942).

1651145890 is a wasteful number, since it uses less digits than its factorization.

1651145890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543241.

The product of its (nonzero) digits is 43200, while the sum is 40.

The square root of 1651145890 is about 40634.2945059958. The cubic root of 1651145890 is about 1181.9392344337.

The spelling of 1651145890 in words is "one billion, six hundred fifty-one million, one hundred forty-five thousand, eight hundred ninety".