25551151061 has 2 divisors, whose sum is σ = 25551151062. Its totient is φ = 25551151060.

The previous prime is 25551151039. The next prime is 25551151097. The reversal of 25551151061 is 16015115552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16665260836 + 8885890225 = 129094^2 + 94265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25551151061 is a prime.

It is a super-2 number, since 2×25551151061² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25551151361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775575530 + 12775575531.

It is an arithmetic number, because the mean of its divisors is an integer number (12775575531).

Almost surely, 2^25551151061 is an apocalyptic number.

It is an amenable number.

25551151061 is a deficient number, since it is larger than the sum of its proper divisors (1).

25551151061 is an equidigital number, since it uses as much as digits as its factorization.

25551151061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7500, while the sum is 32.

The spelling of 25551151061 in words is "twenty-five billion, five hundred fifty-one million, one hundred fifty-one thousand, sixty-one".