7834638118857 has 16 divisors (see below), whose sum is σ = 11788797170880. Its totient is φ = 4584532232000.

The previous prime is 7834638118847. The next prime is 7834638118877. The reversal of 7834638118857 is 7588118364387.

It is a cyclic number.

It is not a de Polignac number, because 7834638118857 - 2¹² = 7834638114761 is a prime.

It is a super-2 number, since 2×7834638118857² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7834638118791 and 7834638118800.

It is not an unprimeable number, because it can be changed into a prime (7834638118817) 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, 4093331394 + ... + 4093333307.

It is an arithmetic number, because the mean of its divisors is an integer number (736799823180).

Almost surely, 2^{7834638118857} is an apocalyptic number.

It is an amenable number.

7834638118857 is a deficient number, since it is larger than the sum of its proper divisors (3954159052023).

7834638118857 is a wasteful number, since it uses less digits than its factorization.

7834638118857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8186664744.

The product of its digits is 216760320, while the sum is 69.

The spelling of 7834638118857 in words is "seven trillion, eight hundred thirty-four billion, six hundred thirty-eight million, one hundred eighteen thousand, eight hundred fifty-seven".