1261133377004 has 24 divisors (see below), whose sum is σ = 2222011386000. Its totient is φ = 626273804480.

The previous prime is 1261133376991. The next prime is 1261133377051. The reversal of 1261133377004 is 4007733311621.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6374534 + ... + 6569394.

It is an arithmetic number, because the mean of its divisors is an integer number (92583807750).

Almost surely, 2^{1261133377004} is an apocalyptic number.

It is an amenable number.

1261133377004 is a deficient number, since it is larger than the sum of its proper divisors (960878008996).

1261133377004 is a wasteful number, since it uses less digits than its factorization.

1261133377004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205873 (or 205871 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 38.

Adding to 1261133377004 its reverse (4007733311621), we get a palindrome (5268866688625).

The spelling of 1261133377004 in words is "one trillion, two hundred sixty-one billion, one hundred thirty-three million, three hundred seventy-seven thousand, four".