80811821511415 has 32 divisors (see below), whose sum is σ = 102737017595520. Its totient is φ = 60811907788800.

The previous prime is 80811821511371. The next prime is 80811821511481. The reversal of 80811821511415 is 51411512811808.

It is a de Polignac number, because none of the positive numbers 2^k-80811821511415 is a prime.

It is a super-2 number, since 2×80811821511415² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1703752750 + ... + 1703800180.

It is an arithmetic number, because the mean of its divisors is an integer number (3210531799860).

Almost surely, 2^{80811821511415} is an apocalyptic number.

80811821511415 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

80811821511415 is a deficient number, since it is larger than the sum of its proper divisors (21925196084105).

80811821511415 is a wasteful number, since it uses less digits than its factorization.

80811821511415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58443.

The product of its (nonzero) digits is 102400, while the sum is 46.

The spelling of 80811821511415 in words is "eighty trillion, eight hundred eleven billion, eight hundred twenty-one million, five hundred eleven thousand, four hundred fifteen".