381505783679 has 16 divisors (see below), whose sum is σ = 417940715520. Its totient is φ = 346629480960.

The previous prime is 381505783669. The next prime is 381505783759. The reversal of 381505783679 is 976387505183.

It is a cyclic number.

It is not a de Polignac number, because 381505783679 - 2²⁰ = 381504735103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381505783669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3351137 + ... + 3463109.

It is an arithmetic number, because the mean of its divisors is an integer number (26121294720).

Almost surely, 2^381505783679 is an apocalyptic number.

381505783679 is a deficient number, since it is larger than the sum of its proper divisors (36434931841).

381505783679 is a wasteful number, since it uses less digits than its factorization.

381505783679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118930.

The product of its (nonzero) digits is 38102400, while the sum is 62.

The spelling of 381505783679 in words is "three hundred eighty-one billion, five hundred five million, seven hundred eighty-three thousand, six hundred seventy-nine".