84215155949505 has 96 divisors (see below), whose sum is σ = 172249880444928. Its totient is φ = 37247349916800.

The previous prime is 84215155949479. The next prime is 84215155949549. The reversal of 84215155949505 is 50594955151248.

84215155949505 is a `hidden beast` number, since 8 + 4 + 21 + 5 + 1 + 559 + 4 + 9 + 50 + 5 = 666.

It is not a de Polignac number, because 84215155949505 - 2⁷ = 84215155949377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 38894572 + ... + 41002658.

It is an arithmetic number, because the mean of its divisors is an integer number (1794269587968).

Almost surely, 2^{84215155949505} is an apocalyptic number.

It is an amenable number.

84215155949505 is an abundant number, since it is smaller than the sum of its proper divisors (88034724495423).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84215155949505 is a wasteful number, since it uses less digits than its factorization.

84215155949505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112227 (or 2112224 counting only the distinct ones).

The product of its (nonzero) digits is 64800000, while the sum is 63.

The spelling of 84215155949505 in words is "eighty-four trillion, two hundred fifteen billion, one hundred fifty-five million, nine hundred forty-nine thousand, five hundred five".