25140177889 has 2 divisors, whose sum is σ = 25140177890. Its totient is φ = 25140177888.

The previous prime is 25140177863. The next prime is 25140177913. The reversal of 25140177889 is 98877104152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15459192225 + 9680985664 = 124335^2 + 98392^2 .

It is a cyclic number.

It is not a de Polignac number, because 25140177889 - 2²³ = 25131789281 is a prime.

It is not a weakly prime, because it can be changed into another prime (25140177809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12570088944 + 12570088945.

It is an arithmetic number, because the mean of its divisors is an integer number (12570088945).

Almost surely, 2^25140177889 is an apocalyptic number.

It is an amenable number.

25140177889 is a deficient number, since it is larger than the sum of its proper divisors (1).

25140177889 is an equidigital number, since it uses as much as digits as its factorization.

25140177889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 52.

The spelling of 25140177889 in words is "twenty-five billion, one hundred forty million, one hundred seventy-seven thousand, eight hundred eighty-nine".