61018159 has 2 divisors, whose sum is σ = 61018160. Its totient is φ = 61018158.

The previous prime is 61018147. The next prime is 61018163. The reversal of 61018159 is 95181016.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61018159 - 2⁹ = 61017647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61018159.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61018109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30509079 + 30509080.

It is an arithmetic number, because the mean of its divisors is an integer number (30509080).

Almost surely, 2^61018159 is an apocalyptic number.

61018159 is a deficient number, since it is larger than the sum of its proper divisors (1).

61018159 is an equidigital number, since it uses as much as digits as its factorization.

61018159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 61018159 is about 7811.4121002543. The cubic root of 61018159 is about 393.6887761027.

It can be divided in two parts, 610 and 18159, that added together give a square (18769 = 137²).

The spelling of 61018159 in words is "sixty-one million, eighteen thousand, one hundred fifty-nine".