10720424641661 has 24 divisors (see below), whose sum is σ = 12669763643712. Its totient is φ = 8885579947200.

The previous prime is 10720424641651. The next prime is 10720424641769. The reversal of 10720424641661 is 16614642402701.

It is a de Polignac number, because none of the positive numbers 2^k-10720424641661 is a prime.

It is a super-2 number, since 2×10720424641661² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10720424641651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8009681 + ... + 9251801.

It is an arithmetic number, because the mean of its divisors is an integer number (527906818488).

Almost surely, 2^{10720424641661} is an apocalyptic number.

It is an amenable number.

10720424641661 is a deficient number, since it is larger than the sum of its proper divisors (1949339002051).

10720424641661 is a wasteful number, since it uses less digits than its factorization.

10720424641661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243473 (or 1243442 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 10720424641661 in words is "ten trillion, seven hundred twenty billion, four hundred twenty-four million, six hundred forty-one thousand, six hundred sixty-one".