1596121681 has 16 divisors (see below), whose sum is σ = 2009299968. Its totient is φ = 1231650000.

The previous prime is 1596121673. The next prime is 1596121693. The reversal of 1596121681 is 1861216951.

It is not a de Polignac number, because 1596121681 - 2³ = 1596121673 is a prime.

It is a super-2 number, since 2×1596121681² = 5095208841116531522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1596121781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92695 + ... + 108556.

It is an arithmetic number, because the mean of its divisors is an integer number (125581248).

Almost surely, 2^1596121681 is an apocalyptic number.

1596121681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1596121681 is a deficient number, since it is larger than the sum of its proper divisors (413178287).

1596121681 is a wasteful number, since it uses less digits than its factorization.

1596121681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201372.

The product of its digits is 25920, while the sum is 40.

The square root of 1596121681 is about 39951.4915991881. The cubic root of 1596121681 is about 1168.6613078969.

The spelling of 1596121681 in words is "one billion, five hundred ninety-six million, one hundred twenty-one thousand, six hundred eighty-one".