84812564 has 6 divisors (see below), whose sum is σ = 148421994. Its totient is φ = 42406280.

The previous prime is 84812557. The next prime is 84812591. The reversal of 84812564 is 46521848.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 81360400 + 3452164 = 9020^2 + 1858^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601567 + ... + 10601574.

It is an arithmetic number, because the mean of its divisors is an integer number (24736999).

Almost surely, 2^84812564 is an apocalyptic number.

It is an amenable number.

84812564 is a deficient number, since it is larger than the sum of its proper divisors (63609430).

84812564 is a wasteful number, since it uses less digits than its factorization.

84812564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21203145 (or 21203143 counting only the distinct ones).

The product of its digits is 61440, while the sum is 38.

The square root of 84812564 is about 9209.3737029181. The cubic root of 84812564 is about 439.3595434211.

The spelling of 84812564 in words is "eighty-four million, eight hundred twelve thousand, five hundred sixty-four".