1616257085041 has 3 divisors (see below), whose sum is σ = 1616258356363. Its totient is φ = 1616255813720.

The previous prime is 1616257085017. The next prime is 1616257085081. The reversal of 1616257085041 is 1405807526161.

The square root of 1616257085041 is 1271321.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 766099323441 + 850157761600 = 875271^2 + 922040^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1616257085041 is a prime.

It is a super-2 number, since 2×1616257085041² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1616257084982 and 1616257085000.

It is not an unprimeable number, because it can be changed into a prime (1616257085081) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 635661 + ... + 1906981.

Almost surely, 2^{1616257085041} is an apocalyptic number.

1616257085041 is the 1271321-st square number.

1616257085041 is the 635661-st centered octagonal number.

It is an amenable number.

1616257085041 is a deficient number, since it is larger than the sum of its proper divisors (1271322).

1616257085041 is an frugal number, since it uses more digits than its factorization.

1616257085041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542642 (or 1271321 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 1616257085041 in words is "one trillion, six hundred sixteen billion, two hundred fifty-seven million, eighty-five thousand, forty-one".