1277376869946 has 16 divisors (see below), whose sum is σ = 2642848696800. Its totient is φ = 411109797168.

The previous prime is 1277376869929. The next prime is 1277376869947. The reversal of 1277376869946 is 6499686737721.

It is not an unprimeable number, because it can be changed into a prime (1277376869947) 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 7 ways as a sum of consecutive naturals, for example, 3670623016 + ... + 3670623363.

It is an arithmetic number, because the mean of its divisors is an integer number (165178043550).

Almost surely, 2^{1277376869946} is an apocalyptic number.

1277376869946 is an abundant number, since it is smaller than the sum of its proper divisors (1365471826854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1277376869946 is a wasteful number, since it uses less digits than its factorization.

1277376869946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7341246413.

The product of its digits is 1152216576, while the sum is 75.

The spelling of 1277376869946 in words is "one trillion, two hundred seventy-seven billion, three hundred seventy-six million, eight hundred sixty-nine thousand, nine hundred forty-six".