1377485805 has 16 divisors (see below), whose sum is σ = 2204688384. Its totient is φ = 734422080.

The previous prime is 1377485783. The next prime is 1377485827. The reversal of 1377485805 is 5085847731.

It is a happy number.

1377485805 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1377485783) and next prime (1377485827).

It is not a de Polignac number, because 1377485805 - 2⁹ = 1377485293 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39700 + ... + 65810.

It is an arithmetic number, because the mean of its divisors is an integer number (137793024).

Almost surely, 2^1377485805 is an apocalyptic number.

1377485805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1377485805 is a deficient number, since it is larger than the sum of its proper divisors (827202579).

1377485805 is a wasteful number, since it uses less digits than its factorization.

1377485805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29636.

The product of its (nonzero) digits is 940800, while the sum is 48.

The square root of 1377485805 is about 37114.4958877256. The cubic root of 1377485805 is about 1112.6597486376.

The spelling of 1377485805 in words is "one billion, three hundred seventy-seven million, four hundred eighty-five thousand, eight hundred five".