28619147645 has 32 divisors (see below), whose sum is σ = 38354964480. Its totient is φ = 20321688640.

The previous prime is 28619147587. The next prime is 28619147657. The reversal of 28619147645 is 54674191682.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-28619147645 is a prime.

It is a super-2 number, since 2×28619147645² (a number of 22 digits) contains 22 as substring.

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, 1069904 + ... + 1096326.

It is an arithmetic number, because the mean of its divisors is an integer number (1198592640).

Almost surely, 2^28619147645 is an apocalyptic number.

It is an amenable number.

28619147645 is a deficient number, since it is larger than the sum of its proper divisors (9735816835).

28619147645 is a wasteful number, since it uses less digits than its factorization.

28619147645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26905.

The product of its digits is 2903040, while the sum is 53.

The spelling of 28619147645 in words is "twenty-eight billion, six hundred nineteen million, one hundred forty-seven thousand, six hundred forty-five".