61018016439 has 8 divisors (see below), whose sum is σ = 81413430912. Its totient is φ = 40650639800.

The previous prime is 61018016387. The next prime is 61018016491. The reversal of 61018016439 is 93461081016.

It is an interprime number because it is at equal distance from previous prime (61018016387) and next prime (61018016491).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61018016439 - 2⁸ = 61018016183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61018016397 and 61018016406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61018016039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7004379 + ... + 7013084.

It is an arithmetic number, because the mean of its divisors is an integer number (10176678864).

Almost surely, 2^61018016439 is an apocalyptic number.

61018016439 is a deficient number, since it is larger than the sum of its proper divisors (20395414473).

61018016439 is a wasteful number, since it uses less digits than its factorization.

61018016439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14018917.

The product of its (nonzero) digits is 31104, while the sum is 39.

The spelling of 61018016439 in words is "sixty-one billion, eighteen million, sixteen thousand, four hundred thirty-nine".