6215746420 has 96 divisors (see below), whose sum is σ = 14286833568. Its totient is φ = 2257846272.

The previous prime is 6215746409. The next prime is 6215746421. The reversal of 6215746420 is 246475126.

It can be written as a sum of positive squares in 16 ways, for example, as 2826410896 + 3389335524 = 53164^2 + 58218^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6215746420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6215746421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4866822 + ... + 4868098.

It is an arithmetic number, because the mean of its divisors is an integer number (148821183).

Almost surely, 2^6215746420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6215746420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7143416784).

6215746420 is an abundant number, since it is smaller than the sum of its proper divisors (8071087148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6215746420 is a wasteful number, since it uses less digits than its factorization.

6215746420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589 (or 1587 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 6215746420 is about 78840.0052004057. The cubic root of 6215746420 is about 1838.6444825033.

The spelling of 6215746420 in words is "six billion, two hundred fifteen million, seven hundred forty-six thousand, four hundred twenty".