80136737280 has 120 divisors (see below), whose sum is σ = 277536139452. Its totient is φ = 21369790464.

The previous prime is 80136737273. The next prime is 80136737281. The reversal of 80136737280 is 8273763108.

80136737280 is a `hidden beast` number, since 8 + 0 + 1 + 367 + 3 + 7 + 280 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 77533288704 + 2603448576 = 278448^2 + 51024^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (80136737281) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1716039 + ... + 1762118.

Almost surely, 2^80136737280 is an apocalyptic number.

80136737280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80136737280 is an abundant number, since it is smaller than the sum of its proper divisors (197399402172).

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

80136737280 is a wasteful number, since it uses less digits than its factorization.

80136737280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478186 (or 3478167 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 80136737280 in words is "eighty billion, one hundred thirty-six million, seven hundred thirty-seven thousand, two hundred eighty".