81462386848 has 12 divisors (see below), whose sum is σ = 160379074170. Its totient is φ = 40731193408.

The previous prime is 81462386821. The next prime is 81462386857. The reversal of 81462386848 is 84868326418.

It can be written as a sum of positive squares in only one way, i.e., 55136675344 + 26325711504 = 234812^2 + 162252^2 .

It is a super-2 number, since 2×81462386848² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81462386792 and 81462386801.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272849763 + ... + 1272849826.

Almost surely, 2^81462386848 is an apocalyptic number.

It is an amenable number.

81462386848 is a deficient number, since it is larger than the sum of its proper divisors (78916687322).

81462386848 is a wasteful number, since it uses less digits than its factorization.

81462386848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545699599 (or 2545699591 counting only the distinct ones).

The product of its digits is 14155776, while the sum is 58.

The spelling of 81462386848 in words is "eighty-one billion, four hundred sixty-two million, three hundred eighty-six thousand, eight hundred forty-eight".