25457043539659 has 2 divisors, whose sum is σ = 25457043539660. Its totient is φ = 25457043539658.

The previous prime is 25457043539657. The next prime is 25457043539687. The reversal of 25457043539659 is 95693534075452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25457043539659 - 2¹ = 25457043539657 is a prime.

It is a super-2 number, since 2×25457043539659² (a number of 28 digits) contains 22 as substring.

Together with 25457043539657, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 25457043539594 and 25457043539603.

It is not a weakly prime, because it can be changed into another prime (25457043539657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12728521769829 + 12728521769830.

It is an arithmetic number, because the mean of its divisors is an integer number (12728521769830).

Almost surely, 2^{25457043539659} is an apocalyptic number.

25457043539659 is a deficient number, since it is larger than the sum of its proper divisors (1).

25457043539659 is an equidigital number, since it uses as much as digits as its factorization.

25457043539659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360000, while the sum is 67.

The spelling of 25457043539659 in words is "twenty-five trillion, four hundred fifty-seven billion, forty-three million, five hundred thirty-nine thousand, six hundred fifty-nine".