25380949097 has 18 divisors (see below), whose sum is σ = 29799977454. Its totient is φ = 21552504960.

The previous prime is 25380949081. The next prime is 25380949117. The reversal of 25380949097 is 79094908352.

It can be written as a sum of positive squares in 3 ways, for example, as 8940837136 + 16440111961 = 94556^2 + 128219^2 .

It is not a de Polignac number, because 25380949097 - 2⁴ = 25380949081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25380949897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11853647 + ... + 11855787.

It is an arithmetic number, because the mean of its divisors is an integer number (1655554303).

Almost surely, 2^25380949097 is an apocalyptic number.

It is an amenable number.

25380949097 is a deficient number, since it is larger than the sum of its proper divisors (4419028357).

25380949097 is an frugal number, since it uses more digits than its factorization.

25380949097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4409 (or 2261 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 25380949097 in words is "twenty-five billion, three hundred eighty million, nine hundred forty-nine thousand, ninety-seven".