25019335949 has 2 divisors, whose sum is σ = 25019335950. Its totient is φ = 25019335948.

The previous prime is 25019335933. The next prime is 25019335973. The reversal of 25019335949 is 94953391052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24662503849 + 356832100 = 157043^2 + 18890^2 .

It is a cyclic number.

It is not a de Polignac number, because 25019335949 - 2⁴ = 25019335933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25019335897 and 25019335906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25019337949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12509667974 + 12509667975.

It is an arithmetic number, because the mean of its divisors is an integer number (12509667975).

Almost surely, 2^25019335949 is an apocalyptic number.

It is an amenable number.

25019335949 is a deficient number, since it is larger than the sum of its proper divisors (1).

25019335949 is an equidigital number, since it uses as much as digits as its factorization.

25019335949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1312200, while the sum is 50.

The spelling of 25019335949 in words is "twenty-five billion, nineteen million, three hundred thirty-five thousand, nine hundred forty-nine".