84216648565251 has 24 divisors (see below), whose sum is σ = 126099369658080. Its totient is φ = 54097106466816.

The previous prime is 84216648565243. The next prime is 84216648565327. The reversal of 84216648565251 is 15256584661248.

84216648565251 is a `hidden beast` number, since 8 + 4 + 2 + 1 + 6 + 6 + 48 + 565 + 25 + 1 = 666.

It is not a de Polignac number, because 84216648565251 - 2³ = 84216648565243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84216648565151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331155390 + ... + 331409603.

It is an arithmetic number, because the mean of its divisors is an integer number (5254140402420).

Almost surely, 2^{84216648565251} is an apocalyptic number.

84216648565251 is a deficient number, since it is larger than the sum of its proper divisors (41882721092829).

84216648565251 is a wasteful number, since it uses less digits than its factorization.

84216648565251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662565515 (or 662565512 counting only the distinct ones).

The product of its digits is 110592000, while the sum is 63.

The spelling of 84216648565251 in words is "eighty-four trillion, two hundred sixteen billion, six hundred forty-eight million, five hundred sixty-five thousand, two hundred fifty-one".