6121711557 has 24 divisors (see below), whose sum is σ = 9684074400. Its totient is φ = 3703351968.

The previous prime is 6121711553. The next prime is 6121711621. The reversal of 6121711557 is 7551171216.

It is a happy number.

6121711557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6121711557 - 2² = 6121711553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6121711553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 436507 + ... + 450312.

It is an arithmetic number, because the mean of its divisors is an integer number (403503100).

Almost surely, 2^6121711557 is an apocalyptic number.

It is an amenable number.

6121711557 is a deficient number, since it is larger than the sum of its proper divisors (3562362843).

6121711557 is a wasteful number, since it uses less digits than its factorization.

6121711557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886897 (or 886894 counting only the distinct ones).

The product of its digits is 14700, while the sum is 36.

The square root of 6121711557 is about 78241.3673001693. The cubic root of 6121711557 is about 1829.3253564421.

The spelling of 6121711557 in words is "six billion, one hundred twenty-one million, seven hundred eleven thousand, five hundred fifty-seven".