135748778356 has 6 divisors (see below), whose sum is σ = 237560362130. Its totient is φ = 67874389176.

The previous prime is 135748778351. The next prime is 135748778383. The reversal of 135748778356 is 653877847531.

It can be written as a sum of positive squares in only one way, i.e., 135556512400 + 192265956 = 368180^2 + 13866^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135748778351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16968597291 + ... + 16968597298.

Almost surely, 2^135748778356 is an apocalyptic number.

It is an amenable number.

135748778356 is a deficient number, since it is larger than the sum of its proper divisors (101811583774).

135748778356 is a wasteful number, since it uses less digits than its factorization.

135748778356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33937194593 (or 33937194591 counting only the distinct ones).

The product of its digits is 118540800, while the sum is 64.

The spelling of 135748778356 in words is "one hundred thirty-five billion, seven hundred forty-eight million, seven hundred seventy-eight thousand, three hundred fifty-six".