80787195393440 has 192 divisors, whose sum is σ = 207044265576960. Its totient is φ = 29668109352960.

The previous prime is 80787195393383. The next prime is 80787195393523. The reversal of 80787195393440 is 4439359178708.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 878620109 + ... + 878712051.

It is an arithmetic number, because the mean of its divisors is an integer number (1078355549880).

Almost surely, 2^{80787195393440} is an apocalyptic number.

80787195393440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80787195393440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103522132788480).

80787195393440 is an abundant number, since it is smaller than the sum of its proper divisors (126257070183520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80787195393440 is a wasteful number, since it uses less digits than its factorization.

80787195393440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99895 (or 99887 counting only the distinct ones).

The product of its (nonzero) digits is 182891520, while the sum is 68.

The spelling of 80787195393440 in words is "eighty trillion, seven hundred eighty-seven billion, one hundred ninety-five million, three hundred ninety-three thousand, four hundred forty".