2140030621661 has 8 divisors (see below), whose sum is σ = 2199708504504. Its totient is φ = 2080709025280.

The previous prime is 2140030621637. The next prime is 2140030621733. The reversal of 2140030621661 is 1661260300412.

It can be written as a sum of positive squares in 4 ways, for example, as 777604748761 + 1362425872900 = 881819^2 + 1167230^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2140030621661 is a prime.

It is a super-2 number, since 2×2140030621661² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140030621601) 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, 89059436 + ... + 89083461.

It is an arithmetic number, because the mean of its divisors is an integer number (274963563063).

Almost surely, 2^{2140030621661} is an apocalyptic number.

It is an amenable number.

2140030621661 is a deficient number, since it is larger than the sum of its proper divisors (59677882843).

2140030621661 is a wasteful number, since it uses less digits than its factorization.

2140030621661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178143231.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 2140030621661 in words is "two trillion, one hundred forty billion, thirty million, six hundred twenty-one thousand, six hundred sixty-one".