82151202788391 has 32 divisors (see below), whose sum is σ = 119525476320000. Its totient is φ = 49774935674880.

The previous prime is 82151202788387. The next prime is 82151202788563. The reversal of 82151202788391 is 19388720215128.

It is not a de Polignac number, because 82151202788391 - 2² = 82151202788387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82151202788311) 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, 2903983975 + ... + 2904012263.

It is an arithmetic number, because the mean of its divisors is an integer number (3735171135000).

Almost surely, 2^{82151202788391} is an apocalyptic number.

82151202788391 is a deficient number, since it is larger than the sum of its proper divisors (37374273531609).

82151202788391 is a wasteful number, since it uses less digits than its factorization.

82151202788391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49359.

The product of its (nonzero) digits is 3870720, while the sum is 57.

The spelling of 82151202788391 in words is "eighty-two trillion, one hundred fifty-one billion, two hundred two million, seven hundred eighty-eight thousand, three hundred ninety-one".