1377081481 has 8 divisors (see below), whose sum is σ = 1458470664. Its totient is φ = 1295735040.

The previous prime is 1377081463. The next prime is 1377081509. The reversal of 1377081481 is 1841807731.

It can be written as a sum of positive squares in 4 ways, for example, as 13995081 + 1363086400 = 3741^2 + 36920^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1377081481 - 2⁷ = 1377081353 is a prime.

It is a super-2 number, since 2×1377081481² = 3792706810626306722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1377081451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75651 + ... + 92071.

It is an arithmetic number, because the mean of its divisors is an integer number (182308833).

Almost surely, 2^1377081481 is an apocalyptic number.

It is an amenable number.

1377081481 is a deficient number, since it is larger than the sum of its proper divisors (81389183).

1377081481 is a wasteful number, since it uses less digits than its factorization.

1377081481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21371.

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 1377081481 is about 37109.0485057216. The cubic root of 1377081481 is about 1112.5508741790.

The spelling of 1377081481 in words is "one billion, three hundred seventy-seven million, eighty-one thousand, four hundred eighty-one".