7716946381 has 4 divisors (see below), whose sum is σ = 7718869564. Its totient is φ = 7715023200.

The previous prime is 7716946291. The next prime is 7716946399. The reversal of 7716946381 is 1836496177.

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

It can be written as a sum of positive squares in 2 ways, for example, as 642622500 + 7074323881 = 25350^2 + 84109^2 .

It is a cyclic number.

It is not a de Polignac number, because 7716946381 - 2²⁵ = 7683391949 is a prime.

It is a super-2 number, since 2×7716946381² (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 (7716946681) 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, 955560 + ... + 963601.

It is an arithmetic number, because the mean of its divisors is an integer number (1929717391).

Almost surely, 2^7716946381 is an apocalyptic number.

It is an amenable number.

7716946381 is a deficient number, since it is larger than the sum of its proper divisors (1923183).

7716946381 is a wasteful number, since it uses less digits than its factorization.

7716946381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923182.

The product of its digits is 1524096, while the sum is 52.

The square root of 7716946381 is about 87846.1517711505. The cubic root of 7716946381 is about 1976.1284055134.

The spelling of 7716946381 in words is "seven billion, seven hundred sixteen million, nine hundred forty-six thousand, three hundred eighty-one".