1601651164 has 24 divisors (see below), whose sum is σ = 2820495888. Its totient is φ = 795809280.

The previous prime is 1601651131. The next prime is 1601651167. The reversal of 1601651164 is 4611561061.

It is a super-2 number, since 2×1601651164² = 5130572902285109792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601651167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 609774 + ... + 612394.

It is an arithmetic number, because the mean of its divisors is an integer number (117520662).

Almost surely, 2^1601651164 is an apocalyptic number.

It is an amenable number.

1601651164 is a deficient number, since it is larger than the sum of its proper divisors (1218844724).

1601651164 is a wasteful number, since it uses less digits than its factorization.

1601651164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525 (or 3523 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1601651164 is about 40020.6342278580. The cubic root of 1601651164 is about 1170.0092930326.

The spelling of 1601651164 in words is "one billion, six hundred one million, six hundred fifty-one thousand, one hundred sixty-four".