381400515785 has 16 divisors (see below), whose sum is σ = 459438802704. Its totient is φ = 303949181952.

The previous prime is 381400515779. The next prime is 381400515841. The reversal of 381400515785 is 587515004183.

It can be written as a sum of positive squares in 8 ways, for example, as 1086559369 + 380313956416 = 32963^2 + 616696^2 .

It is a cyclic number.

It is not a de Polignac number, because 381400515785 - 2³⁰ = 380326773961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3451349 + ... + 3560141.

It is an arithmetic number, because the mean of its divisors is an integer number (28714925169).

Almost surely, 2^381400515785 is an apocalyptic number.

It is an amenable number.

381400515785 is a deficient number, since it is larger than the sum of its proper divisors (78038286919).

381400515785 is a wasteful number, since it uses less digits than its factorization.

381400515785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111484.

The product of its (nonzero) digits is 672000, while the sum is 47.

The spelling of 381400515785 in words is "three hundred eighty-one billion, four hundred million, five hundred fifteen thousand, seven hundred eighty-five".