6537291138 has 160 divisors (see below), whose sum is σ = 17107394304. Its totient is φ = 1827422208.

The previous prime is 6537291121. The next prime is 6537291181. The reversal of 6537291138 is 8311927356.

6537291138 is a `hidden beast` number, since 65 + 372 + 91 + 138 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 6537291093 and 6537291102.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11329506 + ... + 11330082.

Almost surely, 2^6537291138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6537291138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8553697152).

6537291138 is an abundant number, since it is smaller than the sum of its proper divisors (10570103166).

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

6537291138 is a wasteful number, since it uses less digits than its factorization.

6537291138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 789 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 6537291138 is about 80853.5165469010. The cubic root of 6537291138 is about 1869.8177387254.

The spelling of 6537291138 in words is "six billion, five hundred thirty-seven million, two hundred ninety-one thousand, one hundred thirty-eight".