84212025016581 has 128 divisors (see below), whose sum is σ = 157340536197120. Its totient is φ = 43242777676800.

The previous prime is 84212025016577. The next prime is 84212025016643. The reversal of 84212025016581 is 18561052021248.

84212025016581 is a `hidden beast` number, since 8 + 4 + 2 + 1 + 2 + 0 + 2 + 50 + 16 + 581 = 666.

It is not a de Polignac number, because 84212025016581 - 2² = 84212025016577 is a prime.

It is a super-2 number, since 2×84212025016581² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84212025014581) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 101246841 + ... + 102075201.

It is an arithmetic number, because the mean of its divisors is an integer number (1229222939040).

Almost surely, 2^{84212025016581} is an apocalyptic number.

It is an amenable number.

84212025016581 is a deficient number, since it is larger than the sum of its proper divisors (73128511180539).

84212025016581 is a wasteful number, since it uses less digits than its factorization.

84212025016581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828952 (or 828946 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The spelling of 84212025016581 in words is "eighty-four trillion, two hundred twelve billion, twenty-five million, sixteen thousand, five hundred eighty-one".