136778421243277 has 16 divisors (see below), whose sum is σ = 151749451534464. Its totient is φ = 122247141120000.

The previous prime is 136778421243251. The next prime is 136778421243293. The reversal of 136778421243277 is 772342124877631.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136778421243277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136778421243977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424308124 + ... + 424630357.

It is an arithmetic number, because the mean of its divisors is an integer number (9484340720904).

Almost surely, 2^{136778421243277} is an apocalyptic number.

It is an amenable number.

136778421243277 is a deficient number, since it is larger than the sum of its proper divisors (14971030291187).

136778421243277 is a wasteful number, since it uses less digits than its factorization.

136778421243277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848938740.

The product of its digits is 132765696, while the sum is 64.

The spelling of 136778421243277 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 seventy-seven".