2161240653662 has 4 divisors (see below), whose sum is σ = 3241860980496. Its totient is φ = 1080620326830.

The previous prime is 2161240653647. The next prime is 2161240653701. The reversal of 2161240653662 is 2663560421612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2161240653662² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540310163414 + ... + 540310163417.

It is an arithmetic number, because the mean of its divisors is an integer number (810465245124).

Almost surely, 2^{2161240653662} is an apocalyptic number.

2161240653662 is a deficient number, since it is larger than the sum of its proper divisors (1080620326834).

2161240653662 is a wasteful number, since it uses less digits than its factorization.

2161240653662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080620326833.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 2161240653662 in words is "two trillion, one hundred sixty-one billion, two hundred forty million, six hundred fifty-three thousand, six hundred sixty-two".