3778561426 has 32 divisors (see below), whose sum is σ = 6077332800. Its totient is φ = 1756592640.

The previous prime is 3778561393. The next prime is 3778561427. The reversal of 3778561426 is 6241658773.

It is a self number, because there is not a number n which added to its sum of digits gives 3778561426.

It is not an unprimeable number, because it can be changed into a prime (3778561427) 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 in 15 ways as a sum of consecutive naturals, for example, 1974246 + ... + 1976158.

It is an arithmetic number, because the mean of its divisors is an integer number (189916650).

Almost surely, 2^3778561426 is an apocalyptic number.

3778561426 is a deficient number, since it is larger than the sum of its proper divisors (2298771374).

3778561426 is a wasteful number, since it uses less digits than its factorization.

3778561426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874.

The product of its digits is 1693440, while the sum is 49.

The square root of 3778561426 is about 61470.0042785097. The cubic root of 3778561426 is about 1557.5505920681.

The spelling of 3778561426 in words is "three billion, seven hundred seventy-eight million, five hundred sixty-one thousand, four hundred twenty-six".