38678445388441 has 4 divisors (see below), whose sum is σ = 38681269264692. Its totient is φ = 38675621512192.

The previous prime is 38678445388411. The next prime is 38678445388477. The reversal of 38678445388441 is 14488354487683.

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 17802492490000 + 20875952898441 = 4219300^2 + 4569021^2 .

It is a cyclic number.

It is not a de Polignac number, because 38678445388441 - 2²³ = 38678436999833 is a prime.

It is a super-2 number, since 2×38678445388441² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38678445388411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1411917580 + ... + 1411944973.

It is an arithmetic number, because the mean of its divisors is an integer number (9670317316173).

Almost surely, 2^{38678445388441} is an apocalyptic number.

It is an amenable number.

38678445388441 is a deficient number, since it is larger than the sum of its proper divisors (2823876251).

38678445388441 is a wasteful number, since it uses less digits than its factorization.

38678445388441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823876250.

The product of its digits is 1981808640, while the sum is 73.

The spelling of 38678445388441 in words is "thirty-eight trillion, six hundred seventy-eight billion, four hundred forty-five million, three hundred eighty-eight thousand, four hundred forty-one".