28977616507 has 4 divisors (see below), whose sum is σ = 33117276016. Its totient is φ = 24837957000.

The previous prime is 28977616501. The next prime is 28977616511. The reversal of 28977616507 is 70561677982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70561677982 = 2 ⋅35280838991.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28977616507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28977616501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2069829744 + ... + 2069829757.

It is an arithmetic number, because the mean of its divisors is an integer number (8279319004).

Almost surely, 2^28977616507 is an apocalyptic number.

28977616507 is a deficient number, since it is larger than the sum of its proper divisors (4139659509).

28977616507 is an equidigital number, since it uses as much as digits as its factorization.

28977616507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139659508.

The product of its (nonzero) digits is 8890560, while the sum is 58.

The spelling of 28977616507 in words is "twenty-eight billion, nine hundred seventy-seven million, six hundred sixteen thousand, five hundred seven".