82451266951823 has 64 divisors (see below), whose sum is σ = 106613238251520. Its totient is φ = 61906887705600.

The previous prime is 82451266951819. The next prime is 82451266951939. The reversal of 82451266951823 is 32815966215428.

It is a Cunningham number, because it is equal to 9080268²-1.

It is not a de Polignac number, because 82451266951823 - 2² = 82451266951819 is a prime.

It is a super-2 number, since 2×82451266951823² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82451266959823) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 99470198 + ... + 100295676.

It is an arithmetic number, because the mean of its divisors is an integer number (1665831847680).

Almost surely, 2^{82451266951823} is an apocalyptic number.

82451266951823 is a deficient number, since it is larger than the sum of its proper divisors (24161971299697).

82451266951823 is a wasteful number, since it uses less digits than its factorization.

82451266951823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825948.

The product of its digits is 49766400, while the sum is 62.

The spelling of 82451266951823 in words is "eighty-two trillion, four hundred fifty-one billion, two hundred sixty-six million, nine hundred fifty-one thousand, eight hundred twenty-three".