135802456778 has 16 divisors (see below), whose sum is σ = 208064623104. Its totient is φ = 66447954960.

The previous prime is 135802456759. The next prime is 135802456781. The reversal of 135802456778 is 877654208531.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673376 + ... + 851492.

It is an arithmetic number, because the mean of its divisors is an integer number (13004038944).

Almost surely, 2^135802456778 is an apocalyptic number.

135802456778 is a deficient number, since it is larger than the sum of its proper divisors (72262166326).

135802456778 is a wasteful number, since it uses less digits than its factorization.

135802456778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186277.

The product of its (nonzero) digits is 11289600, while the sum is 56.

The spelling of 135802456778 in words is "one hundred thirty-five billion, eight hundred two million, four hundred fifty-six thousand, seven hundred seventy-eight".