61223142159 has 12 divisors (see below), whose sum is σ = 88491209352. Its totient is φ = 40788759600.

The previous prime is 61223142143. The next prime is 61223142163. The reversal of 61223142159 is 95124132216.

61223142159 is a `hidden beast` number, since 6 + 1 + 223 + 1 + 421 + 5 + 9 = 666.

It is not a de Polignac number, because 61223142159 - 2⁴ = 61223142143 is a prime.

It is a super-2 number, since 2×61223142159² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61223140159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2207832 + ... + 2235389.

It is an arithmetic number, because the mean of its divisors is an integer number (7374267446).

Almost surely, 2^61223142159 is an apocalyptic number.

61223142159 is a deficient number, since it is larger than the sum of its proper divisors (27268067193).

61223142159 is a wasteful number, since it uses less digits than its factorization.

61223142159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4444758 (or 4444755 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The spelling of 61223142159 in words is "sixty-one billion, two hundred twenty-three million, one hundred forty-two thousand, one hundred fifty-nine".