1378748554 has 16 divisors (see below), whose sum is σ = 2088333000. Its totient is φ = 682665984.

The previous prime is 1378748507. The next prime is 1378748557. The reversal of 1378748554 is 4558478731.

It can be written as a sum of positive squares in 4 ways, for example, as 672624225 + 706124329 = 25935^2 + 26573^2 .

It is not an unprimeable number, because it can be changed into a prime (1378748557) 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, 93562 + ... + 107290.

Almost surely, 2^1378748554 is an apocalyptic number.

1378748554 is a deficient number, since it is larger than the sum of its proper divisors (709584446).

1378748554 is a wasteful number, since it uses less digits than its factorization.

1378748554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14217.

The product of its digits is 3763200, while the sum is 52.

The square root of 1378748554 is about 37131.5035246353. The cubic root of 1378748554 is about 1112.9996386196. Note that the first 3 decimals are identical.

The spelling of 1378748554 in words is "one billion, three hundred seventy-eight million, seven hundred forty-eight thousand, five hundred fifty-four".