16487442877 has 12 divisors (see below), whose sum is σ = 18062391420. Its totient is φ = 14979913088.

The previous prime is 16487442859. The next prime is 16487442887. The reversal of 16487442877 is 77824478461.

It can be written as a sum of positive squares in 2 ways, for example, as 10835560836 + 5651882041 = 104094^2 + 75179^2 .

It is not a de Polignac number, because 16487442877 - 2³¹ = 14339959229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16487442817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2848128 + ... + 2853910.

It is an arithmetic number, because the mean of its divisors is an integer number (1505199285).

Almost surely, 2^16487442877 is an apocalyptic number.

16487442877 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16487442877 is a deficient number, since it is larger than the sum of its proper divisors (1574948543).

16487442877 is an frugal number, since it uses more digits than its factorization.

16487442877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11612 (or 5829 counting only the distinct ones).

The product of its digits is 16859136, while the sum is 58.

The spelling of 16487442877 in words is "sixteen billion, four hundred eighty-seven million, four hundred forty-two thousand, eight hundred seventy-seven".