25551163373 has 2 divisors, whose sum is σ = 25551163374. Its totient is φ = 25551163372.

The previous prime is 25551163369. The next prime is 25551163397. The reversal of 25551163373 is 37336115552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25218392809 + 332770564 = 158803^2 + 18242^2 .

It is a cyclic number.

It is not a de Polignac number, because 25551163373 - 2² = 25551163369 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25551163373.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25551163073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775581686 + 12775581687.

It is an arithmetic number, because the mean of its divisors is an integer number (12775581687).

Almost surely, 2^25551163373 is an apocalyptic number.

It is an amenable number.

25551163373 is a deficient number, since it is larger than the sum of its proper divisors (1).

25551163373 is an equidigital number, since it uses as much as digits as its factorization.

25551163373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 283500, while the sum is 41.

The spelling of 25551163373 in words is "twenty-five billion, five hundred fifty-one million, one hundred sixty-three thousand, three hundred seventy-three".