28927664465 has 32 divisors (see below), whose sum is σ = 40117668864. Its totient is φ = 19613767680.

The previous prime is 28927664461. The next prime is 28927664471. The reversal of 28927664465 is 56446672982.

It is a happy number.

It is not a de Polignac number, because 28927664465 - 2² = 28927664461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28927664461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4501955 + ... + 4508375.

It is an arithmetic number, because the mean of its divisors is an integer number (1253677152).

Almost surely, 2^28927664465 is an apocalyptic number.

It is an amenable number.

28927664465 is a deficient number, since it is larger than the sum of its proper divisors (11190004399).

28927664465 is a wasteful number, since it uses less digits than its factorization.

28927664465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857.

The product of its digits is 34836480, while the sum is 59.

The spelling of 28927664465 in words is "twenty-eight billion, nine hundred twenty-seven million, six hundred sixty-four thousand, four hundred sixty-five".