25277775527551 has 2 divisors, whose sum is σ = 25277775527552. Its totient is φ = 25277775527550.

The previous prime is 25277775527549. The next prime is 25277775527569. The reversal of 25277775527551 is 15572557777252.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25277775527551 - 2¹ = 25277775527549 is a prime.

Together with 25277775527549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25277775527531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12638887763775 + 12638887763776.

It is an arithmetic number, because the mean of its divisors is an integer number (12638887763776).

Almost surely, 2^{25277775527551} is an apocalyptic number.

25277775527551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25277775527551 is an equidigital number, since it uses as much as digits as its factorization.

25277775527551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420175000, while the sum is 67.

The spelling of 25277775527551 in words is "twenty-five trillion, two hundred seventy-seven billion, seven hundred seventy-five million, five hundred twenty-seven thousand, five hundred fifty-one".