1601685142929 has 27 divisors (see below), whose sum is σ = 2329241878587. Its totient is φ = 1060594024464.

The previous prime is 1601685142919. The next prime is 1601685142957. The reversal of 1601685142929 is 9292415861061.

The square root of 1601685142929 is 1265577.

It is a perfect power (a square), and thus also a powerful number.

1601685142929 is a `hidden beast` number, since 1 + 6 + 0 + 168 + 51 + 429 + 2 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 469478484225 + 1132206658704 = 685185^2 + 1064052^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1601685142929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1601685142919) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 596085424 + ... + 596088110.

Almost surely, 2^{1601685142929} is an apocalyptic number.

1601685142929 is the 1265577-th square number.

1601685142929 is the 632789-th centered octagonal number.

It is an amenable number.

1601685142929 is a deficient number, since it is larger than the sum of its proper divisors (727556735658).

1601685142929 is an frugal number, since it uses more digits than its factorization.

1601685142929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5694 (or 2847 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 1601685142929 in words is "one trillion, six hundred one billion, six hundred eighty-five million, one hundred forty-two thousand, nine hundred twenty-nine".