2478670619857 has 2 divisors, whose sum is σ = 2478670619858. Its totient is φ = 2478670619856.

The previous prime is 2478670619827. The next prime is 2478670619881. The reversal of 2478670619857 is 7589160768742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2462768401041 + 15902218816 = 1569321^2 + 126104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2478670619857 is a prime.

It is a super-2 number, since 2×2478670619857² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2478670619827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239335309928 + 1239335309929.

It is an arithmetic number, because the mean of its divisors is an integer number (1239335309929).

Almost surely, 2^{2478670619857} is an apocalyptic number.

It is an amenable number.

2478670619857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2478670619857 is an equidigital number, since it uses as much as digits as its factorization.

2478670619857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 284497920, while the sum is 70.

The spelling of 2478670619857 in words is "two trillion, four hundred seventy-eight billion, six hundred seventy million, six hundred nineteen thousand, eight hundred fifty-seven".