61015644243 has 24 divisors (see below), whose sum is σ = 94293198480. Its totient is φ = 37904448960.

The previous prime is 61015644211. The next prime is 61015644251. The reversal of 61015644243 is 34244651016.

61015644243 is a `hidden beast` number, since 6 + 1 + 0 + 1 + 5 + 644 + 2 + 4 + 3 = 666.

It is not a de Polignac number, because 61015644243 - 2⁵ = 61015644211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61015644198 and 61015644207.

It is not an unprimeable number, because it can be changed into a prime (61015644043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2914296 + ... + 2935157.

It is an arithmetic number, because the mean of its divisors is an integer number (3928883270).

Almost surely, 2^61015644243 is an apocalyptic number.

61015644243 is a deficient number, since it is larger than the sum of its proper divisors (33277554237).

61015644243 is a wasteful number, since it uses less digits than its factorization.

61015644243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5849539 (or 5849536 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 61015644243 in words is "sixty-one billion, fifteen million, six hundred forty-four thousand, two hundred forty-three".