1377450959778 has 32 divisors (see below), whose sum is σ = 3062123296320. Its totient is φ = 458982145440.

The previous prime is 1377450959761. The next prime is 1377450959789. The reversal of 1377450959778 is 8779590547731.

1377450959778 is a `hidden beast` number, since 13 + 7 + 7 + 450 + 9 + 5 + 97 + 78 = 666.

It is a super-2 number, since 2×1377450959778² (a number of 25 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 4522675 + ... + 4817622.

It is an arithmetic number, because the mean of its divisors is an integer number (95691353010).

Almost surely, 2^{1377450959778} is an apocalyptic number.

1377450959778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1377450959778 is an abundant number, since it is smaller than the sum of its proper divisors (1684672336542).

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

1377450959778 is a wasteful number, since it uses less digits than its factorization.

1377450959778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9343039 (or 9343033 counting only the distinct ones).

The product of its (nonzero) digits is 466754400, while the sum is 72.

The spelling of 1377450959778 in words is "one trillion, three hundred seventy-seven billion, four hundred fifty million, nine hundred fifty-nine thousand, seven hundred seventy-eight".