1277133655461 has 16 divisors (see below), whose sum is σ = 1708836877440. Its totient is φ = 848431411520.

The previous prime is 1277133655429. The next prime is 1277133655463. The reversal of 1277133655461 is 1645563317721.

It is a cyclic number.

It is not a de Polignac number, because 1277133655461 - 2⁵ = 1277133655429 is a prime.

It is a super-2 number, since 2×1277133655461² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1277133655463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406135 + ... + 1649003.

It is an arithmetic number, because the mean of its divisors is an integer number (106802304840).

Almost surely, 2^{1277133655461} is an apocalyptic number.

It is an amenable number.

1277133655461 is a deficient number, since it is larger than the sum of its proper divisors (431703221979).

1277133655461 is a wasteful number, since it uses less digits than its factorization.

1277133655461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244076.

The product of its digits is 3175200, while the sum is 51.

The spelling of 1277133655461 in words is "one trillion, two hundred seventy-seven billion, one hundred thirty-three million, six hundred fifty-five thousand, four hundred sixty-one".