1601280641 has 4 divisors (see below), whose sum is σ = 1607980800. Its totient is φ = 1594580484.

The previous prime is 1601280607. The next prime is 1601280671. The reversal of 1601280641 is 1460821061.

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 1601280641 - 2¹⁴ = 1601264257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601280671) 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, 3349721 + ... + 3350198.

It is an arithmetic number, because the mean of its divisors is an integer number (401995200).

Almost surely, 2^1601280641 is an apocalyptic number.

It is an amenable number.

1601280641 is a deficient number, since it is larger than the sum of its proper divisors (6700159).

1601280641 is an equidigital number, since it uses as much as digits as its factorization.

1601280641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700158.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 1601280641 is about 40016.0048105755. The cubic root of 1601280641 is about 1169.9190634835.

The spelling of 1601280641 in words is "one billion, six hundred one million, two hundred eighty thousand, six hundred forty-one".