16135378285 has 32 divisors (see below), whose sum is σ = 21443919840. Its totient is φ = 11577904128.

The previous prime is 16135378271. The next prime is 16135378319. The reversal of 16135378285 is 58287353161.

It can be written as a sum of positive squares in 16 ways, for example, as 2738010276 + 13397368009 = 52326^2 + 115747^2 .

It is a cyclic number.

It is not a de Polignac number, because 16135378285 - 2⁷ = 16135378157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1989699 + ... + 1997791.

It is an arithmetic number, because the mean of its divisors is an integer number (670122495).

Almost surely, 2^16135378285 is an apocalyptic number.

It is an amenable number.

16135378285 is a deficient number, since it is larger than the sum of its proper divisors (5308541555).

16135378285 is a wasteful number, since it uses less digits than its factorization.

16135378285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8977.

The product of its digits is 1209600, while the sum is 49.

The spelling of 16135378285 in words is "sixteen billion, one hundred thirty-five million, three hundred seventy-eight thousand, two hundred eighty-five".