82643577217654 has 16 divisors (see below), whose sum is σ = 124223236077600. Its totient is φ = 41235914631744.

The previous prime is 82643577217529. The next prime is 82643577217667. The reversal of 82643577217654 is 45671277534628.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 82643577217654.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18695319 + ... + 22689250.

It is an arithmetic number, because the mean of its divisors is an integer number (7763952254850).

Almost surely, 2^{82643577217654} is an apocalyptic number.

82643577217654 is a deficient number, since it is larger than the sum of its proper divisors (41579658859946).

82643577217654 is a wasteful number, since it uses less digits than its factorization.

82643577217654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41386647.

The product of its digits is 474163200, while the sum is 67.

The spelling of 82643577217654 in words is "eighty-two trillion, six hundred forty-three billion, five hundred seventy-seven million, two hundred seventeen thousand, six hundred fifty-four".