6161721652 has 12 divisors (see below), whose sum is σ = 10934886816. Its totient is φ = 3037468280.

The previous prime is 6161721649. The next prime is 6161721661. The reversal of 6161721652 is 2561271616.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10847818 + ... + 10848385.

It is an arithmetic number, because the mean of its divisors is an integer number (911240568).

Almost surely, 2^6161721652 is an apocalyptic number.

It is an amenable number.

6161721652 is a deficient number, since it is larger than the sum of its proper divisors (4773165164).

6161721652 is a wasteful number, since it uses less digits than its factorization.

6161721652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21696278 (or 21696276 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 6161721652 is about 78496.6346539774. The cubic root of 6161721652 is about 1833.3020549448.

The spelling of 6161721652 in words is "six billion, one hundred sixty-one million, seven hundred twenty-one thousand, six hundred fifty-two".