80438780856556 has 24 divisors (see below), whose sum is σ = 141045921455040. Its totient is φ = 40139947834752.

The previous prime is 80438780856541. The next prime is 80438780856557. The reversal of 80438780856556 is 65565808783408.

It is a super-2 number, since 2×80438780856556² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80438780856557) 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, 290751165 + ... + 291027691.

It is an arithmetic number, because the mean of its divisors is an integer number (5876913393960).

Almost surely, 2^{80438780856556} is an apocalyptic number.

It is an amenable number.

80438780856556 is a deficient number, since it is larger than the sum of its proper divisors (60607140598484).

80438780856556 is a wasteful number, since it uses less digits than its factorization.

80438780856556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419913 (or 419911 counting only the distinct ones).

The product of its (nonzero) digits is 1548288000, while the sum is 73.

The spelling of 80438780856556 in words is "eighty trillion, four hundred thirty-eight billion, seven hundred eighty million, eight hundred fifty-six thousand, five hundred fifty-six".