7643801081 has 8 divisors (see below), whose sum is σ = 8825832960. Its totient is φ = 6484284288.

The previous prime is 7643801057. The next prime is 7643801101. The reversal of 7643801081 is 1801083467.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7643801081 - 2⁶ = 7643801017 is a prime.

It is a super-2 number, since 2×7643801081² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7643801281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5628041 + ... + 5629398.

It is an arithmetic number, because the mean of its divisors is an integer number (1103229120).

Almost surely, 2^7643801081 is an apocalyptic number.

It is an amenable number.

7643801081 is a deficient number, since it is larger than the sum of its proper divisors (1182031879).

7643801081 is a wasteful number, since it uses less digits than its factorization.

7643801081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11257543.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 7643801081 is about 87428.8343797400. The cubic root of 7643801081 is about 1969.8649774757.

The spelling of 7643801081 in words is "seven billion, six hundred forty-three million, eight hundred one thousand, eighty-one".