1616402563945 has 64 divisors (see below), whose sum is σ = 2233066268160. Its totient is φ = 1113267456000.

The previous prime is 1616402563933. The next prime is 1616402563949. The reversal of 1616402563945 is 5493652046161.

It is not a de Polignac number, because 1616402563945 - 2²³ = 1616394175337 is a prime.

It is a super-2 number, since 2×1616402563945² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1616402563892 and 1616402563901.

It is not an unprimeable number, because it can be changed into a prime (1616402563949) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 61454037 + ... + 61480333.

It is an arithmetic number, because the mean of its divisors is an integer number (34891660440).

Almost surely, 2^{1616402563945} is an apocalyptic number.

It is an amenable number.

1616402563945 is a deficient number, since it is larger than the sum of its proper divisors (616663704215).

1616402563945 is a wasteful number, since it uses less digits than its factorization.

1616402563945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27106.

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 1616402563945 in words is "one trillion, six hundred sixteen billion, four hundred two million, five hundred sixty-three thousand, nine hundred forty-five".