7868378387534 has 96 divisors (see below), whose sum is σ = 14590528898400. Its totient is φ = 3162155673600.

The previous prime is 7868378387423. The next prime is 7868378387537. The reversal of 7868378387534 is 4357838738687.

It is a super-2 number, since 2×7868378387534² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7868378387537) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1074764594 + ... + 1074771914.

It is an arithmetic number, because the mean of its divisors is an integer number (151984676025).

Almost surely, 2^{7868378387534} is an apocalyptic number.

7868378387534 is a deficient number, since it is larger than the sum of its proper divisors (6722150510866).

7868378387534 is a wasteful number, since it uses less digits than its factorization.

7868378387534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9634 (or 9627 counting only the distinct ones).

The product of its digits is 4551966720, while the sum is 77.

The spelling of 7868378387534 in words is "seven trillion, eight hundred sixty-eight billion, three hundred seventy-eight million, three hundred eighty-seven thousand, five hundred thirty-four".