381678075601 has 3 divisors (see below), whose sum is σ = 381678693403. Its totient is φ = 381677457800.

The previous prime is 381678075539. The next prime is 381678075641. The reversal of 381678075601 is 106570876183.

The square root of 381678075601 is 617801.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 344042075601 + 37636000000 = 586551^2 + 194000^2 .

It is not a de Polignac number, because 381678075601 - 2⁹ = 381678075089 is a prime.

It is a super-2 number, since 2×381678075601² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381678075641) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 308901 + ... + 926701.

Almost surely, 2^381678075601 is an apocalyptic number.

381678075601 is the 617801-st square number.

381678075601 is the 308901-st centered octagonal number.

It is an amenable number.

381678075601 is a deficient number, since it is larger than the sum of its proper divisors (617802).

381678075601 is an frugal number, since it uses more digits than its factorization.

381678075601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235602 (or 617801 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 381678075601 in words is "three hundred eighty-one billion, six hundred seventy-eight million, seventy-five thousand, six hundred one".