1611577261601 has 8 divisors (see below), whose sum is σ = 1619714184000. Its totient is φ = 1603440725040.

The previous prime is 1611577261583. The next prime is 1611577261603. The reversal of 1611577261601 is 1061627751161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1611577261601 - 2³⁰ = 1610503519777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1611577261603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12254486 + ... + 12385296.

It is an arithmetic number, because the mean of its divisors is an integer number (202464273000).

Almost surely, 2^{1611577261601} is an apocalyptic number.

It is an amenable number.

1611577261601 is a deficient number, since it is larger than the sum of its proper divisors (8136922399).

1611577261601 is a wasteful number, since it uses less digits than its factorization.

1611577261601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192919.

The product of its (nonzero) digits is 105840, while the sum is 44.

The spelling of 1611577261601 in words is "one trillion, six hundred eleven billion, five hundred seventy-seven million, two hundred sixty-one thousand, six hundred one".