25434973877 has 2 divisors, whose sum is σ = 25434973878. Its totient is φ = 25434973876.

The previous prime is 25434973859. The next prime is 25434973937. The reversal of 25434973877 is 77837943452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19219385956 + 6215587921 = 138634^2 + 78839^2 .

It is a cyclic number.

It is not a de Polignac number, because 25434973877 - 2⁶ = 25434973813 is a prime.

It is a super-2 number, since 2×25434973877² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25434975877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12717486938 + 12717486939.

It is an arithmetic number, because the mean of its divisors is an integer number (12717486939).

Almost surely, 2^25434973877 is an apocalyptic number.

It is an amenable number.

25434973877 is a deficient number, since it is larger than the sum of its proper divisors (1).

25434973877 is an equidigital number, since it uses as much as digits as its factorization.

25434973877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35562240, while the sum is 59.

The spelling of 25434973877 in words is "twenty-five billion, four hundred thirty-four million, nine hundred seventy-three thousand, eight hundred seventy-seven".