82001868157 has 4 divisors (see below), whose sum is σ = 89456583456. Its totient is φ = 74547152860.

The previous prime is 82001868133. The next prime is 82001868163. The reversal of 82001868157 is 75186810028.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82001868157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82001868167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3727357633 + ... + 3727357654.

It is an arithmetic number, because the mean of its divisors is an integer number (22364145864).

Almost surely, 2^82001868157 is an apocalyptic number.

It is an amenable number.

82001868157 is a deficient number, since it is larger than the sum of its proper divisors (7454715299).

82001868157 is a wasteful number, since it uses less digits than its factorization.

82001868157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7454715298.

The product of its (nonzero) digits is 215040, while the sum is 46.

The spelling of 82001868157 in words is "eighty-two billion, one million, eight hundred sixty-eight thousand, one hundred fifty-seven".