1601162791 has 16 divisors (see below), whose sum is σ = 1658160000. Its totient is φ = 1545120000.

The previous prime is 1601162723. The next prime is 1601162821. The reversal of 1601162791 is 1972611061.

It is a 8-Lehmer number, since φ(1601162791) divides (1601162791-1)⁸.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1601162791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601162291) 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, 2131666 + ... + 2132416.

It is an arithmetic number, because the mean of its divisors is an integer number (103635000).

Almost surely, 2^1601162791 is an apocalyptic number.

1601162791 is a deficient number, since it is larger than the sum of its proper divisors (56997209).

1601162791 is a wasteful number, since it uses less digits than its factorization.

1601162791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1601162791 is about 40014.5322476722. The cubic root of 1601162791 is about 1169.8903618013.

The spelling of 1601162791 in words is "one billion, six hundred one million, one hundred sixty-two thousand, seven hundred ninety-one".