135457778 has 16 divisors (see below), whose sum is σ = 206666016. Its totient is φ = 66575520.

The previous prime is 135457769. The next prime is 135457781. The reversal of 135457778 is 877754531.

135457778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 46925 + ... + 49727.

It is an arithmetic number, because the mean of its divisors is an integer number (12916626).

Almost surely, 2^135457778 is an apocalyptic number.

135457778 is a deficient number, since it is larger than the sum of its proper divisors (71208238).

135457778 is a wasteful number, since it uses less digits than its factorization.

135457778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3209.

The product of its digits is 823200, while the sum is 47.

The square root of 135457778 is about 11638.6329953307. The cubic root of 135457778 is about 513.5719738049.

The spelling of 135457778 in words is "one hundred thirty-five million, four hundred fifty-seven thousand, seven hundred seventy-eight".