25551815153 has 2 divisors, whose sum is σ = 25551815154. Its totient is φ = 25551815152.

The previous prime is 25551815147. The next prime is 25551815227. The reversal of 25551815153 is 35151815552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13232591089 + 12319224064 = 115033^2 + 110992^2 .

It is a cyclic number.

It is not a de Polignac number, because 25551815153 - 2²² = 25547620849 is a prime.

It is a super-2 number, since 2×25551815153² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25551815153.

It is not a weakly prime, because it can be changed into another prime (25551815053) 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 as a sum of consecutive naturals, namely, 12775907576 + 12775907577.

It is an arithmetic number, because the mean of its divisors is an integer number (12775907577).

Almost surely, 2^25551815153 is an apocalyptic number.

It is an amenable number.

25551815153 is a deficient number, since it is larger than the sum of its proper divisors (1).

25551815153 is an equidigital number, since it uses as much as digits as its factorization.

25551815153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150000, while the sum is 41.

The spelling of 25551815153 in words is "twenty-five billion, five hundred fifty-one million, eight hundred fifteen thousand, one hundred fifty-three".