7857873481 has 2 divisors, whose sum is σ = 7857873482. Its totient is φ = 7857873480.

The previous prime is 7857873461. The next prime is 7857873511. The reversal of 7857873481 is 1843787587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6580454400 + 1277419081 = 81120^2 + 35741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7857873481 is a prime.

It is a super-2 number, since 2×7857873481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7857873421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3928936740 + 3928936741.

It is an arithmetic number, because the mean of its divisors is an integer number (3928936741).

Almost surely, 2^7857873481 is an apocalyptic number.

It is an amenable number.

7857873481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7857873481 is an equidigital number, since it uses as much as digits as its factorization.

7857873481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10536960, while the sum is 58.

The square root of 7857873481 is about 88644.6472213636. The cubic root of 7857873481 is about 1988.0852841412.

The spelling of 7857873481 in words is "seven billion, eight hundred fifty-seven million, eight hundred seventy-three thousand, four hundred eighty-one".