8121641763 has 4 divisors (see below), whose sum is σ = 10828855688. Its totient is φ = 5414427840.

The previous prime is 8121641753. The next prime is 8121641771. The reversal of 8121641763 is 3671461218.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-8121641763 is a prime.

It is a super-2 number, since 2×8121641763² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8121641753) 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, 1353606958 + ... + 1353606963.

It is an arithmetic number, because the mean of its divisors is an integer number (2707213922).

Almost surely, 2^8121641763 is an apocalyptic number.

8121641763 is a deficient number, since it is larger than the sum of its proper divisors (2707213925).

8121641763 is a wasteful number, since it uses less digits than its factorization.

8121641763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707213924.

The product of its digits is 48384, while the sum is 39.

The square root of 8121641763 is about 90120.1518141198. The cubic root of 8121641763 is about 2010.0858657410.

The spelling of 8121641763 in words is "eight billion, one hundred twenty-one million, six hundred forty-one thousand, seven hundred sixty-three".