1377243648 has 200 divisors, whose sum is σ = 4485895920. Its totient is φ = 417208320.

The previous prime is 1377243641. The next prime is 1377243653. The reversal of 1377243648 is 8463427731.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1377243641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 454683 + ... + 457701.

Almost surely, 2^1377243648 is an apocalyptic number.

1377243648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1377243648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2242947960).

1377243648 is an abundant number, since it is smaller than the sum of its proper divisors (3108652272).

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

1377243648 is an equidigital number, since it uses as much as digits as its factorization.

1377243648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060 (or 3035 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 1377243648 is about 37111.2334475695. The cubic root of 1377243648 is about 1112.5945443027.

It can be divided in two parts, 1377 and 243648, that added together give a square (245025 = 495²).

The spelling of 1377243648 in words is "one billion, three hundred seventy-seven million, two hundred forty-three thousand, six hundred forty-eight".