1277820322660 has 24 divisors (see below), whose sum is σ = 3066768774720. Its totient is φ = 438109824864.

The previous prime is 1277820322619. The next prime is 1277820322673. The reversal of 1277820322660 is 662230287721.

It is a self number, because there is not a number n which added to its sum of digits gives 1277820322660.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4563643870 + ... + 4563644149.

It is an arithmetic number, because the mean of its divisors is an integer number (127782032280).

Almost surely, 2^{1277820322660} is an apocalyptic number.

1277820322660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1277820322660 is an abundant number, since it is smaller than the sum of its proper divisors (1788948452060).

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

1277820322660 is a wasteful number, since it uses less digits than its factorization.

1277820322660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9127288035 (or 9127288033 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 1277820322660 in words is "one trillion, two hundred seventy-seven billion, eight hundred twenty million, three hundred twenty-two thousand, six hundred sixty".