816290060648 has 8 divisors (see below), whose sum is σ = 1530543863730. Its totient is φ = 408145030320.

The previous prime is 816290060639. The next prime is 816290060659. The reversal of 816290060648 is 846060092618.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 475021451524 + 341268609124 = 689218^2 + 584182^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×816290060648² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 816290060596 and 816290060605.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51018128783 + ... + 51018128798.

Almost surely, 2^816290060648 is an apocalyptic number.

It is an amenable number.

816290060648 is a deficient number, since it is larger than the sum of its proper divisors (714253803082).

816290060648 is a wasteful number, since it uses less digits than its factorization.

816290060648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102036257587 (or 102036257583 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 816290060648 in words is "eight hundred sixteen billion, two hundred ninety million, sixty thousand, six hundred forty-eight".