6158161440 has 144 divisors (see below), whose sum is σ = 22120862400. Its totient is φ = 1555739136.

The previous prime is 6158161423. The next prime is 6158161483. The reversal of 6158161440 is 441618516.

6158161440 is a `hidden beast` number, since 6 + 1 + 58 + 161 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×6158161440² = 75845904642205747200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6158161395 and 6158161404.

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, 85180 + ... + 139899.

It is an arithmetic number, because the mean of its divisors is an integer number (153617100).

Almost surely, 2^6158161440 is an apocalyptic number.

6158161440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6158161440 is an abundant number, since it is smaller than the sum of its proper divisors (15962700960).

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

6158161440 is a wasteful number, since it uses less digits than its factorization.

6158161440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225119 (or 225108 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 6158161440 is about 78473.9538955442. The cubic root of 6158161440 is about 1832.9488959942.

Adding to 6158161440 its reverse (441618516), we get a palindrome (6599779956).

The spelling of 6158161440 in words is "six billion, one hundred fifty-eight million, one hundred sixty-one thousand, four hundred forty".