7138123815402 has 64 divisors (see below), whose sum is σ = 15970525683840. Its totient is φ = 2363183641728.

The previous prime is 7138123815353. The next prime is 7138123815421. The reversal of 7138123815402 is 2045183218317.

7138123815402 is a `hidden beast` number, since 7 + 1 + 3 + 8 + 1 + 23 + 81 + 540 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19290693 + ... + 19657239.

It is an arithmetic number, because the mean of its divisors is an integer number (249539463810).

Almost surely, 2^{7138123815402} is an apocalyptic number.

7138123815402 is an abundant number, since it is smaller than the sum of its proper divisors (8832401868438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7138123815402 is a wasteful number, since it uses less digits than its factorization.

7138123815402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369012 (or 369006 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 7138123815402 in words is "seven trillion, one hundred thirty-eight billion, one hundred twenty-three million, eight hundred fifteen thousand, four hundred two".