1377155057 has 4 divisors (see below), whose sum is σ = 1458164196. Its totient is φ = 1296145920.

The previous prime is 1377154997. The next prime is 1377155111. The reversal of 1377155057 is 7505517731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 589566961 + 787588096 = 24281^2 + 28064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377155057 - 2¹⁰ = 1377154033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1377155257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40504544 + ... + 40504577.

It is an arithmetic number, because the mean of its divisors is an integer number (364541049).

Almost surely, 2^1377155057 is an apocalyptic number.

1377155057 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1377155057 is a deficient number, since it is larger than the sum of its proper divisors (81009139).

1377155057 is an equidigital number, since it uses as much as digits as its factorization.

1377155057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81009138.

The product of its (nonzero) digits is 128625, while the sum is 41.

The square root of 1377155057 is about 37110.0398409918. The cubic root of 1377155057 is about 1112.5706879631.

The spelling of 1377155057 in words is "one billion, three hundred seventy-seven million, one hundred fifty-five thousand, fifty-seven".