61043911531 has 8 divisors (see below), whose sum is σ = 65823987600. Its totient is φ = 56420559360.

The previous prime is 61043911499. The next prime is 61043911541. The reversal of 61043911531 is 13511934016.

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 61043911531 - 2⁵ = 61043911499 is a prime.

It is a super-2 number, since 2×61043911531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61043911541) 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 7 ways as a sum of consecutive naturals, for example, 39180166 + ... + 39181723.

It is an arithmetic number, because the mean of its divisors is an integer number (8227998450).

Almost surely, 2^61043911531 is an apocalyptic number.

61043911531 is a deficient number, since it is larger than the sum of its proper divisors (4780076069).

61043911531 is a wasteful number, since it uses less digits than its factorization.

61043911531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78361949.

The product of its (nonzero) digits is 9720, while the sum is 34.

The spelling of 61043911531 in words is "sixty-one billion, forty-three million, nine hundred eleven thousand, five hundred thirty-one".