138356302878 has 16 divisors (see below), whose sum is σ = 307458450960. Its totient is φ = 46118767608.

The previous prime is 138356302849. The next prime is 138356302891. The reversal of 138356302878 is 878203653831.

138356302878 is a `hidden beast` number, since 1 + 3 + 8 + 3 + 563 + 0 + 2 + 8 + 78 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 2562153757 = 138356302878 / (1 + 3 + 8 + 3 + 5 + 6 + 3 + 0 + 2 + 8 + 7 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1281076825 + ... + 1281076932.

It is an arithmetic number, because the mean of its divisors is an integer number (19216153185).

Almost surely, 2^138356302878 is an apocalyptic number.

138356302878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

138356302878 is an abundant number, since it is smaller than the sum of its proper divisors (169102148082).

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

138356302878 is a wasteful number, since it uses less digits than its factorization.

138356302878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562153768 (or 2562153762 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 138356302878 in words is "one hundred thirty-eight billion, three hundred fifty-six million, three hundred two thousand, eight hundred seventy-eight".