1601494951563 has 192 divisors, whose sum is σ = 2798315520000. Its totient is φ = 873380164608.

The previous prime is 1601494951519. The next prime is 1601494951571. The reversal of 1601494951563 is 3651594941061.

1601494951563 is a `hidden beast` number, since 1 + 6 + 0 + 1 + 494 + 95 + 1 + 5 + 63 = 666.

It is not a de Polignac number, because 1601494951563 - 2⁶ = 1601494951499 is a prime.

It is a super-2 number, since 2×1601494951563² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1601494956563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 352052013 + ... + 352056561.

It is an arithmetic number, because the mean of its divisors is an integer number (14574560000).

Almost surely, 2^{1601494951563} is an apocalyptic number.

1601494951563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1601494951563 is a deficient number, since it is larger than the sum of its proper divisors (1196820568437).

1601494951563 is a wasteful number, since it uses less digits than its factorization.

1601494951563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4786 (or 4783 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 1601494951563 in words is "one trillion, six hundred one billion, four hundred ninety-four million, nine hundred fifty-one thousand, five hundred sixty-three".