6158778516 has 144 divisors (see below), whose sum is σ = 17674104000. Its totient is φ = 1853184960.

The previous prime is 6158778491. The next prime is 6158778523.

6158778516 is a `hidden beast` number, since 6 + 1 + 58 + 7 + 78 + 516 = 666.

6158778516 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1945551 + ... + 1948713.

Almost surely, 2^6158778516 is an apocalyptic number.

6158778516 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6158778516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8837052000).

6158778516 is an abundant number, since it is smaller than the sum of its proper divisors (11515325484).

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

6158778516 is a wasteful number, since it uses less digits than its factorization.

6158778516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347 (or 3328 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 54.

The square root of 6158778516 is about 78477.8855219736. The cubic root of 6158778516 is about 1833.0101172427.

The spelling of 6158778516 in words is "six billion, one hundred fifty-eight million, seven hundred seventy-eight thousand, five hundred sixteen".