84921078951 has 24 divisors (see below), whose sum is σ = 123716802560. Its totient is φ = 56128672656.

The previous prime is 84921078947. The next prime is 84921078953. The reversal of 84921078951 is 15987012948.

It is a happy number.

It is not a de Polignac number, because 84921078951 - 2² = 84921078947 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84921078953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1642176 + ... + 1693098.

Almost surely, 2^84921078951 is an apocalyptic number.

84921078951 is a deficient number, since it is larger than the sum of its proper divisors (38795723609).

84921078951 is a wasteful number, since it uses less digits than its factorization.

84921078951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52515 (or 52512 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

It can be divided in two parts, 8492107 and 8951, that added together give a palindrome (8501058).

The spelling of 84921078951 in words is "eighty-four billion, nine hundred twenty-one million, seventy-eight thousand, nine hundred fifty-one".