82061256405 has 16 divisors (see below), whose sum is σ = 138208432320. Its totient is φ = 41462529408.

The previous prime is 82061256283. The next prime is 82061256451. The reversal of 82061256405 is 50465216028.

It is not a de Polignac number, because 82061256405 - 2¹² = 82061252309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143966832 + ... + 143967401.

It is an arithmetic number, because the mean of its divisors is an integer number (8638027020).

Almost surely, 2^82061256405 is an apocalyptic number.

It is an amenable number.

82061256405 is a deficient number, since it is larger than the sum of its proper divisors (56147175915).

82061256405 is a wasteful number, since it uses less digits than its factorization.

82061256405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287934260.

The product of its (nonzero) digits is 115200, while the sum is 39.

The spelling of 82061256405 in words is "eighty-two billion, sixty-one million, two hundred fifty-six thousand, four hundred five".