2625918857 has 2 divisors, whose sum is σ = 2625918858. Its totient is φ = 2625918856.

The previous prime is 2625918781. The next prime is 2625918863. The reversal of 2625918857 is 7588195262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2574953536 + 50965321 = 50744^2 + 7139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2625918857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2625918799 and 2625918808.

It is not a weakly prime, because it can be changed into another prime (2625918557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1312959428 + 1312959429.

It is an arithmetic number, because the mean of its divisors is an integer number (1312959429).

Almost surely, 2^2625918857 is an apocalyptic number.

It is an amenable number.

2625918857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2625918857 is an equidigital number, since it uses as much as digits as its factorization.

2625918857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 53.

The square root of 2625918857 is about 51243.7201713537. The cubic root of 2625918857 is about 1379.6230254006.

The spelling of 2625918857 in words is "two billion, six hundred twenty-five million, nine hundred eighteen thousand, eight hundred fifty-seven".