80663869440 has 1152 divisors, whose sum is σ = 362318261760. Its totient is φ = 16721510400.

The previous prime is 80663869421. The next prime is 80663869441. The reversal of 80663869440 is 4496836608.

80663869440 is a `hidden beast` number, since 80 + 6 + 63 + 8 + 69 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80663869441) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 191600430 + ... + 191600850.

It is an arithmetic number, because the mean of its divisors is an integer number (314512380).

Almost surely, 2^80663869440 is an apocalyptic number.

80663869440 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 80663869440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181159130880).

80663869440 is an abundant number, since it is smaller than the sum of its proper divisors (281654392320).

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

80663869440 is a wasteful number, since it uses less digits than its factorization.

80663869440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The spelling of 80663869440 in words is "eighty billion, six hundred sixty-three million, eight hundred sixty-nine thousand, four hundred forty".