84990551645 has 16 divisors (see below), whose sum is σ = 102613139712. Its totient is φ = 67576392000.

The previous prime is 84990551641. The next prime is 84990551677. The reversal of 84990551645 is 54615509948.

It is not a de Polignac number, because 84990551645 - 2² = 84990551641 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84990551641) 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, 2797004 + ... + 2827226.

It is an arithmetic number, because the mean of its divisors is an integer number (6413321232).

Almost surely, 2^84990551645 is an apocalyptic number.

It is an amenable number.

84990551645 is a deficient number, since it is larger than the sum of its proper divisors (17622588067).

84990551645 is a wasteful number, since it uses less digits than its factorization.

84990551645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33652.

The product of its (nonzero) digits is 7776000, while the sum is 56.

The spelling of 84990551645 in words is "eighty-four billion, nine hundred ninety million, five hundred fifty-one thousand, six hundred forty-five".