25156626097 has 2 divisors, whose sum is σ = 25156626098. Its totient is φ = 25156626096.

The previous prime is 25156626043. The next prime is 25156626149. The reversal of 25156626097 is 79062665152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25116227361 + 40398736 = 158481^2 + 6356^2 .

It is a cyclic number.

It is not a de Polignac number, because 25156626097 - 2¹⁹ = 25156101809 is a prime.

It is a super-2 number, since 2×25156626097² (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 25156626097.

It is not a weakly prime, because it can be changed into another prime (25156126097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12578313048 + 12578313049.

It is an arithmetic number, because the mean of its divisors is an integer number (12578313049).

Almost surely, 2^25156626097 is an apocalyptic number.

It is an amenable number.

25156626097 is a deficient number, since it is larger than the sum of its proper divisors (1).

25156626097 is an equidigital number, since it uses as much as digits as its factorization.

25156626097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 25156626097 in words is "twenty-five billion, one hundred fifty-six million, six hundred twenty-six thousand, ninety-seven".