7738171440645 has 16 divisors (see below), whose sum is σ = 12420884840832. Its totient is φ = 4113754589760.

The previous prime is 7738171440599. The next prime is 7738171440647. The reversal of 7738171440645 is 5460441718377.

It is a happy number.

It is not a de Polignac number, because 7738171440645 - 2¹⁸ = 7738171178501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7738171440647) 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, 829381342 + ... + 829390671.

It is an arithmetic number, because the mean of its divisors is an integer number (776305302552).

Almost surely, 2^{7738171440645} is an apocalyptic number.

It is an amenable number.

7738171440645 is a deficient number, since it is larger than the sum of its proper divisors (4682713400187).

7738171440645 is a wasteful number, since it uses less digits than its factorization.

7738171440645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658772332.

The product of its (nonzero) digits is 15805440, while the sum is 57.

The spelling of 7738171440645 in words is "seven trillion, seven hundred thirty-eight billion, one hundred seventy-one million, four hundred forty thousand, six hundred forty-five".