82077645 has 32 divisors (see below), whose sum is σ = 141950592. Its totient is φ = 40257792.

The previous prime is 82077643. The next prime is 82077647. The reversal of 82077645 is 54677028.

It is an interprime number because it is at equal distance from previous prime (82077643) and next prime (82077647).

It is not a de Polignac number, because 82077645 - 2¹ = 82077643 is a prime.

It is a super-3 number, since 3×82077645³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82077643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67059 + ... + 68271.

It is an arithmetic number, because the mean of its divisors is an integer number (4435956).

Almost surely, 2^82077645 is an apocalyptic number.

It is an amenable number.

82077645 is a deficient number, since it is larger than the sum of its proper divisors (59872947).

82077645 is a wasteful number, since it uses less digits than its factorization.

82077645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 82077645 is about 9059.6713516551. The cubic root of 82077645 is about 434.5852302233.

The spelling of 82077645 in words is "eighty-two million, seventy-seven thousand, six hundred forty-five".