9780135455 has 4 divisors (see below), whose sum is σ = 11736162552. Its totient is φ = 7824108360.

The previous prime is 9780135451. The next prime is 9780135467. The reversal of 9780135455 is 5545310879.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 9780135455 - 2² = 9780135451 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 (9780135451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 978013541 + ... + 978013550.

It is an arithmetic number, because the mean of its divisors is an integer number (2934040638).

Almost surely, 2^9780135455 is an apocalyptic number.

9780135455 is a deficient number, since it is larger than the sum of its proper divisors (1956027097).

9780135455 is a wasteful number, since it uses less digits than its factorization.

9780135455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956027096.

The product of its (nonzero) digits is 756000, while the sum is 47.

The square root of 9780135455 is about 98894.5673684859. The cubic root of 9780135455 is about 2138.5280773355.

The spelling of 9780135455 in words is "nine billion, seven hundred eighty million, one hundred thirty-five thousand, four hundred fifty-five".