1650601651 has 4 divisors (see below), whose sum is σ = 1656692704. Its totient is φ = 1644510600.

The previous prime is 1650601643. The next prime is 1650601663. The reversal of 1650601651 is 1561060561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1561060561 = 1109 ⋅1407629.

It is a cyclic number.

It is not a de Polignac number, because 1650601651 - 2³ = 1650601643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1650605651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3045120 + ... + 3045661.

It is an arithmetic number, because the mean of its divisors is an integer number (414173176).

Almost surely, 2^1650601651 is an apocalyptic number.

1650601651 is a deficient number, since it is larger than the sum of its proper divisors (6091053).

1650601651 is an equidigital number, since it uses as much as digits as its factorization.

1650601651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6091052.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1650601651 is about 40627.5971600586. The cubic root of 1650601651 is about 1181.8093593534.

The spelling of 1650601651 in words is "one billion, six hundred fifty million, six hundred one thousand, six hundred fifty-one".