28151523612 has 36 divisors (see below), whose sum is σ = 72366916440. Its totient is φ = 9224792352.

The previous prime is 28151523599. The next prime is 28151523649. The reversal of 28151523612 is 21632515182.

28151523612 is a `hidden beast` number, since 2 + 8 + 1 + 5 + 15 + 23 + 612 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6624883 + ... + 6629130.

Almost surely, 2^28151523612 is an apocalyptic number.

It is an amenable number.

28151523612 is an abundant number, since it is smaller than the sum of its proper divisors (44215392828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28151523612 is a wasteful number, since it uses less digits than its factorization.

28151523612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13254082 (or 13254077 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The spelling of 28151523612 in words is "twenty-eight billion, one hundred fifty-one million, five hundred twenty-three thousand, six hundred twelve".