80646619299840 has 1024 divisors, whose sum is σ = 313662295814400. Its totient is φ = 19497222144000.

The previous prime is 80646619299809. The next prime is 80646619299853. The reversal of 80646619299840 is 4899291664608.

80646619299840 is a `hidden beast` number, since 8 + 0 + 6 + 466 + 19 + 29 + 98 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (1024).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19512850414 + ... + 19512854546.

Almost surely, 2^{80646619299840} is an apocalyptic number.

80646619299840 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 80646619299840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156831147907200).

80646619299840 is an abundant number, since it is smaller than the sum of its proper divisors (233015676514560).

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

80646619299840 is a wasteful number, since it uses less digits than its factorization.

80646619299840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4589 (or 4555 counting only the distinct ones).

The product of its (nonzero) digits is 322486272, while the sum is 72.

The spelling of 80646619299840 in words is "eighty trillion, six hundred forty-six billion, six hundred nineteen million, two hundred ninety-nine thousand, eight hundred forty".