1016161556499 has 24 divisors (see below), whose sum is σ = 1472716277760. Its totient is φ = 675170687088.

The previous prime is 1016161556479. The next prime is 1016161556507. The reversal of 1016161556499 is 9946551616101.

1016161556499 is a `hidden beast` number, since 1 + 0 + 1 + 61 + 6 + 15 + 564 + 9 + 9 = 666.

It is not a de Polignac number, because 1016161556499 - 2⁹ = 1016161555987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1016161556479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3048342 + ... + 3365220.

It is an arithmetic number, because the mean of its divisors is an integer number (61363178240).

Almost surely, 2^{1016161556499} is an apocalyptic number.

1016161556499 is a deficient number, since it is larger than the sum of its proper divisors (456554721261).

1016161556499 is a wasteful number, since it uses less digits than its factorization.

1016161556499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318079 (or 318076 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The spelling of 1016161556499 in words is "one trillion, sixteen billion, one hundred sixty-one million, five hundred fifty-six thousand, four hundred ninety-nine".