84168379551 has 16 divisors (see below), whose sum is σ = 112743446400. Its totient is φ = 55852891488.

The previous prime is 84168379523. The next prime is 84168379577. The reversal of 84168379551 is 15597386148.

It is not a de Polignac number, because 84168379551 - 2⁹ = 84168379039 is a prime.

It is a super-2 number, since 2×84168379551² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84168379491 and 84168379500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84168379501) 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, 3986260 + ... + 4007318.

It is an arithmetic number, because the mean of its divisors is an integer number (7046465400).

Almost surely, 2^84168379551 is an apocalyptic number.

84168379551 is a deficient number, since it is larger than the sum of its proper divisors (28575066849).

84168379551 is a wasteful number, since it uses less digits than its factorization.

84168379551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27158.

The product of its digits is 7257600, while the sum is 57.

The spelling of 84168379551 in words is "eighty-four billion, one hundred sixty-eight million, three hundred seventy-nine thousand, five hundred fifty-one".