4001613501 has 4 divisors (see below), whose sum is σ = 5335484672. Its totient is φ = 2667742332.

The previous prime is 4001613487. The next prime is 4001613509. The reversal of 4001613501 is 1053161004.

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 not a de Polignac number, because 4001613501 - 2⁶ = 4001613437 is a prime.

It is a super-2 number, since 2×4001613501² = 32025821222770954002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001613509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666935581 + ... + 666935586.

It is an arithmetic number, because the mean of its divisors is an integer number (1333871168).

Almost surely, 2^4001613501 is an apocalyptic number.

It is an amenable number.

4001613501 is a deficient number, since it is larger than the sum of its proper divisors (1333871171).

4001613501 is a wasteful number, since it uses less digits than its factorization.

4001613501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333871170.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 4001613501 is about 63258.3077626963. The cubic root of 4001613501 is about 1587.6144627080.

Adding to 4001613501 its reverse (1053161004), we get a palindrome (5054774505).

The spelling of 4001613501 in words is "four billion, one million, six hundred thirteen thousand, five hundred one".