80642787037220 has 24 divisors (see below), whose sum is σ = 169403837561784. Its totient is φ = 32246831998976.

The previous prime is 80642787037213. The next prime is 80642787037249. The reversal of 80642787037220 is 2273078724608.

It can be written as a sum of positive squares in 4 ways, for example, as 18461613703204 + 62181173334016 = 4296698^2 + 7885504^2 .

It is a super-2 number, since 2×80642787037220² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642611687 + ... + 642737166.

It is an arithmetic number, because the mean of its divisors is an integer number (7058493231741).

Almost surely, 2^{80642787037220} is an apocalyptic number.

It is an amenable number.

80642787037220 is an abundant number, since it is smaller than the sum of its proper divisors (88761050524564).

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

80642787037220 is a wasteful number, since it uses less digits than its factorization.

80642787037220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285351999 (or 1285351997 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 56.

The spelling of 80642787037220 in words is "eighty trillion, six hundred forty-two billion, seven hundred eighty-seven million, thirty-seven thousand, two hundred twenty".