26169554149 has 2 divisors, whose sum is σ = 26169554150. Its totient is φ = 26169554148.

The previous prime is 26169554119. The next prime is 26169554207. The reversal of 26169554149 is 94145596162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25553621025 + 615933124 = 159855^2 + 24818^2 .

It is a cyclic number.

It is not a de Polignac number, because 26169554149 - 2¹³ = 26169545957 is a prime.

It is a super-2 number, since 2×26169554149² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26169554096 and 26169554105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26169554119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13084777074 + 13084777075.

It is an arithmetic number, because the mean of its divisors is an integer number (13084777075).

Almost surely, 2^26169554149 is an apocalyptic number.

It is an amenable number.

26169554149 is a deficient number, since it is larger than the sum of its proper divisors (1).

26169554149 is an equidigital number, since it uses as much as digits as its factorization.

26169554149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 52.

It can be divided in two parts, 261695 and 54149, that added together give a square (315844 = 562²).

The spelling of 26169554149 in words is "twenty-six billion, one hundred sixty-nine million, five hundred fifty-four thousand, one hundred forty-nine".