25878862515377 has 2 divisors, whose sum is σ = 25878862515378. Its totient is φ = 25878862515376.

The previous prime is 25878862515283. The next prime is 25878862515461. The reversal of 25878862515377 is 77351526887852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25023165363856 + 855697151521 = 5002316^2 + 925039^2 .

It is a cyclic number.

It is not a de Polignac number, because 25878862515377 - 2²² = 25878858321073 is a prime.

It is a super-2 number, since 2×25878862515377² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25878862515677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12939431257688 + 12939431257689.

It is an arithmetic number, because the mean of its divisors is an integer number (12939431257689).

Almost surely, 2^{25878862515377} is an apocalyptic number.

It is an amenable number.

25878862515377 is a deficient number, since it is larger than the sum of its proper divisors (1).

25878862515377 is an equidigital number, since it uses as much as digits as its factorization.

25878862515377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1580544000, while the sum is 74.

The spelling of 25878862515377 in words is "twenty-five trillion, eight hundred seventy-eight billion, eight hundred sixty-two million, five hundred fifteen thousand, three hundred seventy-seven".