1277667654164 has 24 divisors (see below), whose sum is σ = 2523293488800. Its totient is φ = 560731885280.

The previous prime is 1277667654091. The next prime is 1277667654167. The reversal of 1277667654164 is 4614567667721.

It is a junction number, because it is equal to n+sod(n) for n = 1277667654097 and 1277667654106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1277667654167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500652194 + ... + 500654745.

It is an arithmetic number, because the mean of its divisors is an integer number (105137228700).

Almost surely, 2^{1277667654164} is an apocalyptic number.

It is an amenable number.

1277667654164 is a deficient number, since it is larger than the sum of its proper divisors (1245625834636).

1277667654164 is a wasteful number, since it uses less digits than its factorization.

1277667654164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001306983 (or 1001306981 counting only the distinct ones).

The product of its digits is 71124480, while the sum is 62.

The spelling of 1277667654164 in words is "one trillion, two hundred seventy-seven billion, six hundred sixty-seven million, six hundred fifty-four thousand, one hundred sixty-four".