1381455649 has 8 divisors (see below), whose sum is σ = 1671677568. Its totient is φ = 1114451520.

The previous prime is 1381455641. The next prime is 1381455661. The reversal of 1381455649 is 9465541831.

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

It is not a de Polignac number, because 1381455649 - 2³ = 1381455641 is a prime.

It is a super-2 number, since 2×1381455649² = 3816839420308022402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1381455599 and 1381455608.

It is not an unprimeable number, because it can be changed into a prime (1381455641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5804317 + ... + 5804554.

It is an arithmetic number, because the mean of its divisors is an integer number (208959696).

Almost surely, 2^1381455649 is an apocalyptic number.

It is an amenable number.

1381455649 is a deficient number, since it is larger than the sum of its proper divisors (290221919).

1381455649 is a wasteful number, since it uses less digits than its factorization.

1381455649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11608895.

The product of its digits is 518400, while the sum is 46.

The square root of 1381455649 is about 37167.9384550717. The cubic root of 1381455649 is about 1113.7275997230.

The spelling of 1381455649 in words is "one billion, three hundred eighty-one million, four hundred fifty-five thousand, six hundred forty-nine".