5011001681 has 4 divisors (see below), whose sum is σ = 5726859072. Its totient is φ = 4295144292.

The previous prime is 5011001663. The next prime is 5011001713. The reversal of 5011001681 is 1861001105.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1861001105 = 5 ⋅372200221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5011001681 is a prime.

It is a super-2 number, since 2×5011001681² = 50220275693969651522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5011001381) 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, 357928685 + ... + 357928698.

It is an arithmetic number, because the mean of its divisors is an integer number (1431714768).

Almost surely, 2^5011001681 is an apocalyptic number.

It is an amenable number.

5011001681 is a deficient number, since it is larger than the sum of its proper divisors (715857391).

5011001681 is an equidigital number, since it uses as much as digits as its factorization.

5011001681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715857390.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 5011001681 is about 70788.4290050288. The cubic root of 5011001681 is about 1711.2292019236.

Adding to 5011001681 its reverse (1861001105), we get a palindrome (6872002786).

The spelling of 5011001681 in words is "five billion, eleven million, one thousand, six hundred eighty-one".