7816636138147 has 4 divisors (see below), whose sum is σ = 7857136843720. Its totient is φ = 7776135432576.

The previous prime is 7816636138123. The next prime is 7816636138159. The reversal of 7816636138147 is 7418316366187.

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

It is a cyclic number.

It is not a de Polignac number, because 7816636138147 - 2³⁹ = 7266880324259 is a prime.

It is a super-2 number, since 2×7816636138147² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7816636138547) 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, 20250352497 + ... + 20250352882.

It is an arithmetic number, because the mean of its divisors is an integer number (1964284210930).

Almost surely, 2^{7816636138147} is an apocalyptic number.

7816636138147 is a deficient number, since it is larger than the sum of its proper divisors (40500705573).

7816636138147 is a wasteful number, since it uses less digits than its factorization.

7816636138147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40500705572.

The product of its digits is 24385536, while the sum is 61.

The spelling of 7816636138147 in words is "seven trillion, eight hundred sixteen billion, six hundred thirty-six million, one hundred thirty-eight thousand, one hundred forty-seven".