136778421243266 has 32 divisors (see below), whose sum is σ = 247288770903168. Its totient is φ = 55970709456640.

The previous prime is 136778421243251. The next prime is 136778421243293. The reversal of 136778421243266 is 662342124877631.

It is a junction number, because it is equal to n+sod(n) for n = 136778421243199 and 136778421243208.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7950376265 + ... + 7950393468.

It is an arithmetic number, because the mean of its divisors is an integer number (7727774090724).

Almost surely, 2^{136778421243266} is an apocalyptic number.

136778421243266 is a deficient number, since it is larger than the sum of its proper divisors (110510349659902).

136778421243266 is a wasteful number, since it uses less digits than its factorization.

136778421243266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15900769786.

The product of its digits is 97542144, while the sum is 62.

The spelling of 136778421243266 in words is "one hundred thirty-six trillion, seven hundred seventy-eight billion, four hundred twenty-one million, two hundred forty-three thousand, two hundred sixty-six".