28156735654 has 32 divisors (see below), whose sum is σ = 45089104896. Its totient is φ = 13156323840.

The previous prime is 28156735619. The next prime is 28156735667. The reversal of 28156735654 is 45653765182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1236189 + ... + 1258759.

It is an arithmetic number, because the mean of its divisors is an integer number (1409034528).

Almost surely, 2^28156735654 is an apocalyptic number.

28156735654 is a deficient number, since it is larger than the sum of its proper divisors (16932369242).

28156735654 is a wasteful number, since it uses less digits than its factorization.

28156735654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23220.

The product of its digits is 6048000, while the sum is 52.

The spelling of 28156735654 in words is "twenty-eight billion, one hundred fifty-six million, seven hundred thirty-five thousand, six hundred fifty-four".