81480687458 has 8 divisors (see below), whose sum is σ = 122224175580. Its totient is φ = 40739295600.

The previous prime is 81480687443. The next prime is 81480687467. The reversal of 81480687458 is 85478608418.

It can be written as a sum of positive squares in 2 ways, for example, as 81198212209 + 282475249 = 284953^2 + 16807^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 81480687397 and 81480687406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422993 + ... + 584708.

Almost surely, 2^81480687458 is an apocalyptic number.

81480687458 is a deficient number, since it is larger than the sum of its proper divisors (40743488122).

81480687458 is a wasteful number, since it uses less digits than its factorization.

81480687458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048132.

The product of its (nonzero) digits is 13762560, while the sum is 59.

The spelling of 81480687458 in words is "eighty-one billion, four hundred eighty million, six hundred eighty-seven thousand, four hundred fifty-eight".