82511964 has 18 divisors (see below), whose sum is σ = 208572000. Its totient is φ = 27503976.

The previous prime is 82511963. The next prime is 82511977. The reversal of 82511964 is 46911528.

82511964 is a `hidden beast` number, since 82 + 511 + 9 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2291999 = 82511964 / (8 + 2 + 5 + 1 + 1 + 9 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82511963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1145964 + ... + 1146035.

Almost surely, 2^82511964 is an apocalyptic number.

It is an amenable number.

82511964 is an abundant number, since it is smaller than the sum of its proper divisors (126060036).

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

82511964 is a wasteful number, since it uses less digits than its factorization.

82511964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292009 (or 2292004 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 82511964 is about 9083.6096349414. The cubic root of 82511964 is about 435.3504271001.

The spelling of 82511964 in words is "eighty-two million, five hundred eleven thousand, nine hundred sixty-four".