136840688378 has 8 divisors (see below), whose sum is σ = 208324630272. Its totient is φ = 67399144956.

The previous prime is 136840688377. The next prime is 136840688389. The reversal of 136840688378 is 873886048631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 136840688378.

It is not an unprimeable number, because it can be changed into a prime (136840688377) 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, 510599450 + ... + 510599717.

It is an arithmetic number, because the mean of its divisors is an integer number (26040578784).

Almost surely, 2^136840688378 is an apocalyptic number.

136840688378 is a deficient number, since it is larger than the sum of its proper divisors (71483941894).

136840688378 is a wasteful number, since it uses less digits than its factorization.

136840688378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021199236.

The product of its (nonzero) digits is 37158912, while the sum is 62.

The spelling of 136840688378 in words is "one hundred thirty-six billion, eight hundred forty million, six hundred eighty-eight thousand, three hundred seventy-eight".