61628731443 has 32 divisors (see below), whose sum is σ = 91766534400. Its totient is φ = 40876956288.

The previous prime is 61628731441. The next prime is 61628731447. The reversal of 61628731443 is 34413782616.

61628731443 is a `hidden beast` number, since 6 + 1 + 628 + 7 + 3 + 14 + 4 + 3 = 666.

It is not a de Polignac number, because 61628731443 - 2¹ = 61628731441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61628731441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13046280 + ... + 13051002.

It is an arithmetic number, because the mean of its divisors is an integer number (2867704200).

Almost surely, 2^61628731443 is an apocalyptic number.

61628731443 is a deficient number, since it is larger than the sum of its proper divisors (30137802957).

61628731443 is a wasteful number, since it uses less digits than its factorization.

61628731443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7088 (or 7082 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The spelling of 61628731443 in words is "sixty-one billion, six hundred twenty-eight million, seven hundred thirty-one thousand, four hundred forty-three".