84404461779 has 16 divisors (see below), whose sum is σ = 136411251840. Its totient is φ = 51154219080.

The previous prime is 84404461727. The next prime is 84404461783. The reversal of 84404461779 is 97716440448.

84404461779 is a `hidden beast` number, since 84 + 40 + 446 + 17 + 79 = 666.

It is not a de Polignac number, because 84404461779 - 2³¹ = 82256978131 is a prime.

It is a super-2 number, since 2×84404461779² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84404461789) 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, 142094757 + ... + 142095350.

It is an arithmetic number, because the mean of its divisors is an integer number (8525703240).

Almost surely, 2^84404461779 is an apocalyptic number.

84404461779 is a deficient number, since it is larger than the sum of its proper divisors (52006790061).

84404461779 is a wasteful number, since it uses less digits than its factorization.

84404461779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284190127 (or 284190121 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 84404461779 in words is "eighty-four billion, four hundred four million, four hundred sixty-one thousand, seven hundred seventy-nine".