80815323780 has 96 divisors (see below), whose sum is σ = 258220798080. Its totient is φ = 20968295040.

The previous prime is 80815323763. The next prime is 80815323781. The reversal of 80815323780 is 8732351808.

80815323780 is a `hidden beast` number, since 8 + 0 + 8 + 1 + 532 + 37 + 80 = 666.

It is a super-2 number, since 2×80815323780² (a number of 23 digits) contains 22 as substring.

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 (80815323781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2002426 + ... + 2042385.

It is an arithmetic number, because the mean of its divisors is an integer number (2689799980).

Almost surely, 2^80815323780 is an apocalyptic number.

It is an amenable number.

80815323780 is an abundant number, since it is smaller than the sum of its proper divisors (177405474300).

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

80815323780 is a wasteful number, since it uses less digits than its factorization.

80815323780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044866 (or 4044858 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 80815323780 in words is "eighty billion, eight hundred fifteen million, three hundred twenty-three thousand, seven hundred eighty".