28464641777 has 32 divisors (see below), whose sum is σ = 33777112320. Its totient is φ = 23788277760.

The previous prime is 28464641773. The next prime is 28464641797. The reversal of 28464641777 is 77714646482.

It is not a de Polignac number, because 28464641777 - 2² = 28464641773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28464641771) 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, 6208628 + ... + 6213210.

It is an arithmetic number, because the mean of its divisors is an integer number (1055534760).

Almost surely, 2^28464641777 is an apocalyptic number.

It is an amenable number.

28464641777 is a deficient number, since it is larger than the sum of its proper divisors (5312470543).

28464641777 is a wasteful number, since it uses less digits than its factorization.

28464641777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4890 (or 4864 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 56.

The spelling of 28464641777 in words is "twenty-eight billion, four hundred sixty-four million, six hundred forty-one thousand, seven hundred seventy-seven".