1611610665677 has 16 divisors (see below), whose sum is σ = 1729003320000. Its totient is φ = 1497493880064.

The previous prime is 1611610665673. The next prime is 1611610665697. The reversal of 1611610665677 is 7765660161161.

It is a cyclic number.

It is not a de Polignac number, because 1611610665677 - 2² = 1611610665673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611610665673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2851574 + ... + 3369672.

It is an arithmetic number, because the mean of its divisors is an integer number (108062707500).

Almost surely, 2^{1611610665677} is an apocalyptic number.

It is an amenable number.

1611610665677 is a deficient number, since it is larger than the sum of its proper divisors (117392654323).

1611610665677 is a wasteful number, since it uses less digits than its factorization.

1611610665677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521260.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 1611610665677 in words is "one trillion, six hundred eleven billion, six hundred ten million, six hundred sixty-five thousand, six hundred seventy-seven".