381275520365 has 4 divisors (see below), whose sum is σ = 457530624444. Its totient is φ = 305020416288.

The previous prime is 381275520347. The next prime is 381275520371. The reversal of 381275520365 is 563025572183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 169363525444 + 211911994921 = 411538^2 + 460339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381275520365 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38127552032 + ... + 38127552041.

It is an arithmetic number, because the mean of its divisors is an integer number (114382656111).

Almost surely, 2^381275520365 is an apocalyptic number.

It is an amenable number.

381275520365 is a deficient number, since it is larger than the sum of its proper divisors (76255104079).

381275520365 is an equidigital number, since it uses as much as digits as its factorization.

381275520365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76255104078.

The product of its (nonzero) digits is 1512000, while the sum is 47.

The spelling of 381275520365 in words is "three hundred eighty-one billion, two hundred seventy-five million, five hundred twenty thousand, three hundred sixty-five".