616727526561 has 40 divisors (see below), whose sum is σ = 937587391488. Its totient is φ = 403917192000.

The previous prime is 616727526553. The next prime is 616727526587. The reversal of 616727526561 is 165625727616.

It is a happy number.

616727526561 is a `hidden beast` number, since 6 + 1 + 6 + 7 + 2 + 75 + 2 + 6 + 561 = 666.

It is not a de Polignac number, because 616727526561 - 2³ = 616727526553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 616727526498 and 616727526507.

It is not an unprimeable number, because it can be changed into a prime (616727526511) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1425216 + ... + 1806846.

Almost surely, 2^616727526561 is an apocalyptic number.

It is an amenable number.

616727526561 is a deficient number, since it is larger than the sum of its proper divisors (320859864927).

616727526561 is a wasteful number, since it uses less digits than its factorization.

616727526561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381995 (or 381986 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The spelling of 616727526561 in words is "six hundred sixteen billion, seven hundred twenty-seven million, five hundred twenty-six thousand, five hundred sixty-one".