16987687028977 has 4 divisors (see below), whose sum is σ = 19414499461696. Its totient is φ = 14560874596260.

The previous prime is 16987687028959. The next prime is 16987687029067. The reversal of 16987687028977 is 77982078678961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16987687028977 - 2⁴³ = 8191594006769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16987687028894 and 16987687028903.

It is not an unprimeable number, because it can be changed into a prime (16987387028977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1213406216349 + ... + 1213406216362.

It is an arithmetic number, because the mean of its divisors is an integer number (4853624865424).

Almost surely, 2^{16987687028977} is an apocalyptic number.

It is an amenable number.

16987687028977 is a deficient number, since it is larger than the sum of its proper divisors (2426812432719).

16987687028977 is an equidigital number, since it uses as much as digits as its factorization.

16987687028977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426812432718.

The product of its (nonzero) digits is 7169347584, while the sum is 85.

The spelling of 16987687028977 in words is "sixteen trillion, nine hundred eighty-seven billion, six hundred eighty-seven million, twenty-eight thousand, nine hundred seventy-seven".