61528334861 has 16 divisors (see below), whose sum is σ = 70768886400. Its totient is φ = 52400659968.

The previous prime is 61528334831. The next prime is 61528334867. The reversal of 61528334861 is 16843382516.

It is a cyclic number.

It is not a de Polignac number, because 61528334861 - 2¹⁸ = 61528072717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61528334867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7491125 + ... + 7499333.

It is an arithmetic number, because the mean of its divisors is an integer number (4423055400).

Almost surely, 2^61528334861 is an apocalyptic number.

It is an amenable number.

61528334861 is a deficient number, since it is larger than the sum of its proper divisors (9240551539).

61528334861 is a wasteful number, since it uses less digits than its factorization.

61528334861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14948.

The product of its digits is 829440, while the sum is 47.

The spelling of 61528334861 in words is "sixty-one billion, five hundred twenty-eight million, three hundred thirty-four thousand, eight hundred sixty-one".