1277704920380 has 72 divisors (see below), whose sum is σ = 3122410103568. Its totient is φ = 437907520512.

The previous prime is 1277704920367. The next prime is 1277704920407. The reversal of 1277704920380 is 830294077721.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2412044 + ... + 2893676.

It is an arithmetic number, because the mean of its divisors is an integer number (43366806994).

Almost surely, 2^{1277704920380} is an apocalyptic number.

1277704920380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1277704920380 is an abundant number, since it is smaller than the sum of its proper divisors (1844705183188).

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

1277704920380 is a wasteful number, since it uses less digits than its factorization.

1277704920380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484363 (or 484354 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 1277704920380 in words is "one trillion, two hundred seventy-seven billion, seven hundred four million, nine hundred twenty thousand, three hundred eighty".