1277854200149 has 2 divisors, whose sum is σ = 1277854200150. Its totient is φ = 1277854200148.

The previous prime is 1277854200113. The next prime is 1277854200163. The reversal of 1277854200149 is 9410024587721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 984496559524 + 293357640625 = 992218^2 + 541625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1277854200149 is a prime.

It is a super-2 number, since 2×1277854200149² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1277854200097 and 1277854200106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1277854200179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638927100074 + 638927100075.

It is an arithmetic number, because the mean of its divisors is an integer number (638927100075).

Almost surely, 2^{1277854200149} is an apocalyptic number.

It is an amenable number.

1277854200149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277854200149 is an equidigital number, since it uses as much as digits as its factorization.

1277854200149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 1277854200149 in words is "one trillion, two hundred seventy-seven billion, eight hundred fifty-four million, two hundred thousand, one hundred forty-nine".