61528472744 has 16 divisors (see below), whose sum is σ = 116555226900. Its totient is φ = 30447078912.

The previous prime is 61528472689. The next prime is 61528472771. The reversal of 61528472744 is 44727482516.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 54957424900 + 6571047844 = 234430^2 + 81062^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61528472692 and 61528472701.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 39643859 + ... + 39645410.

Almost surely, 2^61528472744 is an apocalyptic number.

It is an amenable number.

61528472744 is a deficient number, since it is larger than the sum of its proper divisors (55026754156).

61528472744 is a wasteful number, since it uses less digits than its factorization.

61528472744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79289372 (or 79289368 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 50.

The spelling of 61528472744 in words is "sixty-one billion, five hundred twenty-eight million, four hundred seventy-two thousand, seven hundred forty-four".