84980509551 has 24 divisors (see below), whose sum is σ = 148537363104. Its totient is φ = 45703802880.

The previous prime is 84980509547. The next prime is 84980509583. The reversal of 84980509551 is 15590508948.

84980509551 is a `hidden beast` number, since 8 + 4 + 9 + 80 + 5 + 0 + 9 + 551 = 666.

It is not a de Polignac number, because 84980509551 - 2² = 84980509547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84980509501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39672370 + ... + 39674511.

It is an arithmetic number, because the mean of its divisors is an integer number (6189056796).

Almost surely, 2^84980509551 is an apocalyptic number.

84980509551 is a deficient number, since it is larger than the sum of its proper divisors (63556853553).

84980509551 is a wasteful number, since it uses less digits than its factorization.

84980509551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79346911 (or 79346908 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 54.

The spelling of 84980509551 in words is "eighty-four billion, nine hundred eighty million, five hundred nine thousand, five hundred fifty-one".