4099154981769 has 9 divisors (see below), whose sum is σ = 5921010413773. Its totient is φ = 2732765938572.

The previous prime is 4099154981767. The next prime is 4099154981783. The reversal of 4099154981769 is 9671894519904.

The square root of 4099154981769 is 2024637.

It is a perfect power (a square), and thus also a powerful number.

4099154981769 is a `hidden beast` number, since 4 + 0 + 9 + 9 + 1 + 549 + 8 + 1 + 76 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 4099154981769 - 2¹ = 4099154981767 is a prime.

It is a super-2 number, since 2×4099154981769² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4099154981697 and 4099154981706.

It is not an unprimeable number, because it can be changed into a prime (4099154981767) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5736472 + ... + 6411350.

Almost surely, 2^{4099154981769} is an apocalyptic number.

4099154981769 is the 2024637-th square number.

4099154981769 is the 1012319-th centered octagonal number.

It is an amenable number.

4099154981769 is a deficient number, since it is larger than the sum of its proper divisors (1821855432004).

4099154981769 is an frugal number, since it uses more digits than its factorization.

4099154981769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349764 (or 674882 counting only the distinct ones).

The product of its (nonzero) digits is 176359680, while the sum is 72.

It can be divided in two parts, 409915 and 4981769, that added together give a square (5391684 = 2322²).

The spelling of 4099154981769 in words is "four trillion, ninety-nine billion, one hundred fifty-four million, nine hundred eighty-one thousand, seven hundred sixty-nine".