1607020289681 has 4 divisors (see below), whose sum is σ = 1608972927552. Its totient is φ = 1605067651812.

The previous prime is 1607020289639. The next prime is 1607020289689. The reversal of 1607020289681 is 1869820207061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1607020289681 - 2¹⁴ = 1607020273297 is a prime.

It is a super-4 number, since 4×1607020289681⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1607020289689) 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, 976317701 + ... + 976319346.

It is an arithmetic number, because the mean of its divisors is an integer number (402243231888).

Almost surely, 2^{1607020289681} is an apocalyptic number.

It is an amenable number.

1607020289681 is a deficient number, since it is larger than the sum of its proper divisors (1952637871).

1607020289681 is an equidigital number, since it uses as much as digits as its factorization.

1607020289681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952637870.

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 1607020289681 in words is "one trillion, six hundred seven billion, twenty million, two hundred eighty-nine thousand, six hundred eighty-one".