7671952381 has 4 divisors (see below), whose sum is σ = 8005515552. Its totient is φ = 7338389212.

The previous prime is 7671952333. The next prime is 7671952391. The reversal of 7671952381 is 1832591767.

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.

It is a cyclic number.

It is not a de Polignac number, because 7671952381 - 2⁹ = 7671951869 is a prime.

It is a super-2 number, since 2×7671952381² (a number of 21 digits) 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 (7671952391) 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, 166781551 + ... + 166781596.

It is an arithmetic number, because the mean of its divisors is an integer number (2001378888).

Almost surely, 2^7671952381 is an apocalyptic number.

It is an amenable number.

7671952381 is a deficient number, since it is larger than the sum of its proper divisors (333563171).

7671952381 is a wasteful number, since it uses less digits than its factorization.

7671952381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333563170.

The product of its digits is 635040, while the sum is 49.

The square root of 7671952381 is about 87589.6819322915. The cubic root of 7671952381 is about 1972.2802819792.

The spelling of 7671952381 in words is "seven billion, six hundred seventy-one million, nine hundred fifty-two thousand, three hundred eighty-one".