7715482381 has 2 divisors, whose sum is σ = 7715482382. Its totient is φ = 7715482380.

The previous prime is 7715482373. The next prime is 7715482409. The reversal of 7715482381 is 1832845177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6873902281 + 841580100 = 82909^2 + 29010^2 .

It is a cyclic number.

It is not a de Polignac number, because 7715482381 - 2³ = 7715482373 is a prime.

It is a super-2 number, since 2×7715482381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7715482301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3857741190 + 3857741191.

It is an arithmetic number, because the mean of its divisors is an integer number (3857741191).

Almost surely, 2^7715482381 is an apocalyptic number.

It is an amenable number.

7715482381 is a deficient number, since it is larger than the sum of its proper divisors (1).

7715482381 is an equidigital number, since it uses as much as digits as its factorization.

7715482381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376320, while the sum is 46.

The square root of 7715482381 is about 87837.8186261476. The cubic root of 7715482381 is about 1976.0034322916.

The spelling of 7715482381 in words is "seven billion, seven hundred fifteen million, four hundred eighty-two thousand, three hundred eighty-one".