28135540463642 has 4 divisors (see below), whose sum is σ = 42203310695466. Its totient is φ = 14067770231820.

The previous prime is 28135540463627. The next prime is 28135540463687. The reversal of 28135540463642 is 24636404553182.

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

It can be written as a sum of positive squares in only one way, i.e., 25720528114681 + 2415012348961 = 5071541^2 + 1554031^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7033885115909 + ... + 7033885115912.

Almost surely, 2^{28135540463642} is an apocalyptic number.

28135540463642 is a deficient number, since it is larger than the sum of its proper divisors (14067770231824).

28135540463642 is a wasteful number, since it uses less digits than its factorization.

28135540463642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14067770231823.

The product of its (nonzero) digits is 16588800, while the sum is 53.

The spelling of 28135540463642 in words is "twenty-eight trillion, one hundred thirty-five billion, five hundred forty million, four hundred sixty-three thousand, six hundred forty-two".