1481347778 has 4 divisors (see below), whose sum is σ = 2222021670. Its totient is φ = 740673888.

The previous prime is 1481347771. The next prime is 1481347781. The reversal of 1481347778 is 8777431841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8777431841 = 1733 ⋅5064877.

It can be written as a sum of positive squares in only one way, i.e., 1318198249 + 163149529 = 36307^2 + 12773^2 .

It is not an unprimeable number, because it can be changed into a prime (1481347771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370336943 + ... + 370336946.

Almost surely, 2^1481347778 is an apocalyptic number.

1481347778 is a deficient number, since it is larger than the sum of its proper divisors (740673892).

1481347778 is an equidigital number, since it uses as much as digits as its factorization.

1481347778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740673891.

The product of its digits is 1053696, while the sum is 50.

The square root of 1481347778 is about 38488.2810476124. The cubic root of 1481347778 is about 1139.9496689588.

The spelling of 1481347778 in words is "one billion, four hundred eighty-one million, three hundred forty-seven thousand, seven hundred seventy-eight".