6356479840 has 144 divisors (see below), whose sum is σ = 15745478112. Its totient is φ = 2424619008.

The previous prime is 6356479823. The next prime is 6356479853. The reversal of 6356479840 is 489746536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13052077 + ... + 13052563.

It is an arithmetic number, because the mean of its divisors is an integer number (109343598).

Almost surely, 2^6356479840 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 6356479840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7872739056).

6356479840 is an abundant number, since it is smaller than the sum of its proper divisors (9388998272).

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

6356479840 is a wasteful number, since it uses less digits than its factorization.

6356479840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 52.

The square root of 6356479840 is about 79727.5350177089. The cubic root of 6356479840 is about 1852.4175688457.

The spelling of 6356479840 in words is "six billion, three hundred fifty-six million, four hundred seventy-nine thousand, eight hundred forty".