6156915840 has 256 divisors, whose sum is σ = 23089536000. Its totient is φ = 1545191424.

The previous prime is 6156915833. The next prime is 6156915883. The reversal of 6156915840 is 485196516.

6156915840 is a `hidden beast` number, since 6 + 1 + 5 + 69 + 1 + 584 + 0 = 666.

It is a super-2 number, since 2×6156915840² = 75815225321685811200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 283281 + ... + 304239.

It is an arithmetic number, because the mean of its divisors is an integer number (90193500).

Almost surely, 2^6156915840 is an apocalyptic number.

6156915840 is a gapful number since it is divisible by the number (60) 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 6156915840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11544768000).

6156915840 is an abundant number, since it is smaller than the sum of its proper divisors (16932620160).

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

6156915840 is a wasteful number, since it uses less digits than its factorization.

6156915840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21004 (or 20986 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 6156915840 is about 78466.0171029472. The cubic root of 6156915840 is about 1832.8253052591.

The spelling of 6156915840 in words is "six billion, one hundred fifty-six million, nine hundred fifteen thousand, eight hundred forty".