25401950393 has 2 divisors, whose sum is σ = 25401950394. Its totient is φ = 25401950392.

The previous prime is 25401950389. The next prime is 25401950411. The reversal of 25401950393 is 39305910452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14044146064 + 11357804329 = 118508^2 + 106573^2 .

It is a cyclic number.

It is not a de Polignac number, because 25401950393 - 2² = 25401950389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25401950393.

It is not a weakly prime, because it can be changed into another prime (25401952393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12700975196 + 12700975197.

It is an arithmetic number, because the mean of its divisors is an integer number (12700975197).

Almost surely, 2^25401950393 is an apocalyptic number.

It is an amenable number.

25401950393 is a deficient number, since it is larger than the sum of its proper divisors (1).

25401950393 is an equidigital number, since it uses as much as digits as its factorization.

25401950393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 41.

The spelling of 25401950393 in words is "twenty-five billion, four hundred one million, nine hundred fifty thousand, three hundred ninety-three".