5911155978 has 128 divisors (see below), whose sum is σ = 14875176960. Its totient is φ = 1524579840.

The previous prime is 5911155977. The next prime is 5911155983. The reversal of 5911155978 is 8795511195.

It is a self number, because there is not a number n which added to its sum of digits gives 5911155978.

It is not an unprimeable number, because it can be changed into a prime (5911155977) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5387926 + ... + 5389022.

It is an arithmetic number, because the mean of its divisors is an integer number (116212320).

Almost surely, 2^5911155978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5911155978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7437588480).

5911155978 is an abundant number, since it is smaller than the sum of its proper divisors (8964020982).

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

5911155978 is a wasteful number, since it uses less digits than its factorization.

5911155978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332.

The product of its digits is 567000, while the sum is 51.

The square root of 5911155978 is about 76884.0424145349. The cubic root of 5911155978 is about 1808.1070508328.

The spelling of 5911155978 in words is "five billion, nine hundred eleven million, one hundred fifty-five thousand, nine hundred seventy-eight".