1616006650061 has 4 divisors (see below), whose sum is σ = 1616909953500. Its totient is φ = 1615103346624.

The previous prime is 1616006650057. The next prime is 1616006650091. The reversal of 1616006650061 is 1600566006161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1576202409961 + 39804240100 = 1255469^2 + 199510^2 .

It is a cyclic number.

It is not a de Polignac number, because 1616006650061 - 2² = 1616006650057 is a prime.

It is a super-2 number, since 2×1616006650061² (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 = 1616006649997 and 1616006650024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616006650021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451649036 + ... + 451652613.

It is an arithmetic number, because the mean of its divisors is an integer number (404227488375).

Almost surely, 2^{1616006650061} is an apocalyptic number.

It is an amenable number.

1616006650061 is a deficient number, since it is larger than the sum of its proper divisors (903303439).

1616006650061 is an equidigital number, since it uses as much as digits as its factorization.

1616006650061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903303438.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 1616006650061 in words is "one trillion, six hundred sixteen billion, six million, six hundred fifty thousand, sixty-one".