1616015556601 has 4 divisors (see below), whose sum is σ = 1635485623632. Its totient is φ = 1596545489572.

The previous prime is 1616015556553. The next prime is 1616015556613. The reversal of 1616015556601 is 1066555106161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1616015556601 - 2⁷ = 1616015556473 is a prime.

It is a super-2 number, since 2×1616015556601² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616015556691) 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, 9735033391 + ... + 9735033556.

It is an arithmetic number, because the mean of its divisors is an integer number (408871405908).

Almost surely, 2^{1616015556601} is an apocalyptic number.

It is an amenable number.

1616015556601 is a deficient number, since it is larger than the sum of its proper divisors (19470067031).

1616015556601 is an equidigital number, since it uses as much as digits as its factorization.

1616015556601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19470067030.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 1616015556601 in words is "one trillion, six hundred sixteen billion, fifteen million, five hundred fifty-six thousand, six hundred one".