6015505981 has 4 divisors (see below), whose sum is σ = 6369359292. Its totient is φ = 5661652672.

The previous prime is 6015505973. The next prime is 6015505987. The reversal of 6015505981 is 1895055106.

6015505981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2473470756 + 3542035225 = 49734^2 + 59515^2 .

It is a cyclic number.

It is not a de Polignac number, because 6015505981 - 2³ = 6015505973 is a prime.

It is a super-2 number, since 2×6015505981² = 72372624414893544722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6015505987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176926630 + ... + 176926663.

It is an arithmetic number, because the mean of its divisors is an integer number (1592339823).

Almost surely, 2^6015505981 is an apocalyptic number.

It is an amenable number.

6015505981 is a deficient number, since it is larger than the sum of its proper divisors (353853311).

6015505981 is a wasteful number, since it uses less digits than its factorization.

6015505981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353853310.

The product of its (nonzero) digits is 54000, while the sum is 40.

The square root of 6015505981 is about 77559.6930177009. The cubic root of 6015505981 is about 1818.6845928289.

The spelling of 6015505981 in words is "six billion, fifteen million, five hundred five thousand, nine hundred eighty-one".