5406391680 has 256 divisors, whose sum is σ = 18504676800. Its totient is φ = 1337720832.

The previous prime is 5406391673. The next prime is 5406391691. The reversal of 5406391680 is 861936045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2381586 + ... + 2383854.

Almost surely, 2^5406391680 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 5406391680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9252338400).

5406391680 is an abundant number, since it is smaller than the sum of its proper divisors (13098285120).

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

5406391680 is a wasteful number, since it uses less digits than its factorization.

5406391680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381 (or 2369 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 5406391680 is about 73528.1692958556. The cubic root of 5406391680 is about 1755.1025694714.

The spelling of 5406391680 in words is "five billion, four hundred six million, three hundred ninety-one thousand, six hundred eighty".