7161651701661 has 8 divisors (see below), whose sum is σ = 9554916357280. Its totient is φ = 4771410756912.

The previous prime is 7161651701657. The next prime is 7161651701669. The reversal of 7161651701661 is 1661071561617.

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

It is not a de Polignac number, because 7161651701661 - 2² = 7161651701657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7161651701661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7161651701669) 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, 755922190 + ... + 755931663.

It is an arithmetic number, because the mean of its divisors is an integer number (1194364544660).

Almost surely, 2^{7161651701661} is an apocalyptic number.

It is an amenable number.

7161651701661 is a deficient number, since it is larger than the sum of its proper divisors (2393264655619).

7161651701661 is a wasteful number, since it uses less digits than its factorization.

7161651701661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511855435.

The product of its (nonzero) digits is 317520, while the sum is 48.

The spelling of 7161651701661 in words is "seven trillion, one hundred sixty-one billion, six hundred fifty-one million, seven hundred one thousand, six hundred sixty-one".