80784155136 has 80 divisors (see below), whose sum is σ = 216329930784. Its totient is φ = 26788429824.

The previous prime is 80784155131. The next prime is 80784155147. The reversal of 80784155136 is 63155148708.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (80784155131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160195 + ... + 432701.

Almost surely, 2^80784155136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80784155136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108164965392).

80784155136 is an abundant number, since it is smaller than the sum of its proper divisors (135545775648).

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

80784155136 is a wasteful number, since it uses less digits than its factorization.

80784155136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272721 (or 272705 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 80784155136 in words is "eighty billion, seven hundred eighty-four million, one hundred fifty-five thousand, one hundred thirty-six".