16389777957 has 16 divisors (see below), whose sum is σ = 25020575232. Its totient is φ = 9348459120.

The previous prime is 16389777923. The next prime is 16389777959. The reversal of 16389777957 is 75977798361.

It is not a de Polignac number, because 16389777957 - 2⁷ = 16389777829 is a prime.

It is a super-3 number, since 3×16389777957³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16389777891 and 16389777900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16389777959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701919 + ... + 724892.

It is an arithmetic number, because the mean of its divisors is an integer number (1563785952).

Almost surely, 2^16389777957 is an apocalyptic number.

It is an amenable number.

16389777957 is a deficient number, since it is larger than the sum of its proper divisors (8630797275).

16389777957 is a wasteful number, since it uses less digits than its factorization.

16389777957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427368.

The product of its digits is 140026320, while the sum is 69.

The spelling of 16389777957 in words is "sixteen billion, three hundred eighty-nine million, seven hundred seventy-seven thousand, nine hundred fifty-seven".