6427615544 has 64 divisors (see below), whose sum is σ = 14783601600. Its totient is φ = 2557108224.

The previous prime is 6427615541. The next prime is 6427615559. The reversal of 6427615544 is 4455167246.

It is a junction number, because it is equal to n+sod(n) for n = 6427615495 and 6427615504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6427615541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23252 + ... + 115740.

It is an arithmetic number, because the mean of its divisors is an integer number (230993775).

Almost surely, 2^6427615544 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 6427615544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7391800800).

6427615544 is an abundant number, since it is smaller than the sum of its proper divisors (8355986056).

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

6427615544 is a wasteful number, since it uses less digits than its factorization.

6427615544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92592 (or 92588 counting only the distinct ones).

The product of its digits is 806400, while the sum is 44.

The square root of 6427615544 is about 80172.4113645087. The cubic root of 6427615544 is about 1859.3021184206.

The spelling of 6427615544 in words is "six billion, four hundred twenty-seven million, six hundred fifteen thousand, five hundred forty-four".