1481778694 has 16 divisors (see below), whose sum is σ = 2464480656. Its totient is φ = 662493600.

The previous prime is 1481778691. The next prime is 1481778713. The reversal of 1481778694 is 4968771841.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1481778691) 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, 550737 + ... + 553420.

It is an arithmetic number, because the mean of its divisors is an integer number (154030041).

Almost surely, 2^1481778694 is an apocalyptic number.

1481778694 is a deficient number, since it is larger than the sum of its proper divisors (982701962).

1481778694 is a wasteful number, since it uses less digits than its factorization.

1481778694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104231.

The product of its digits is 2709504, while the sum is 55.

The square root of 1481778694 is about 38493.8786562227. The cubic root of 1481778694 is about 1140.0601932924.

The spelling of 1481778694 in words is "one billion, four hundred eighty-one million, seven hundred seventy-eight thousand, six hundred ninety-four".