61072724533 has 2 divisors, whose sum is σ = 61072724534. Its totient is φ = 61072724532.

The previous prime is 61072724513. The next prime is 61072724539. The reversal of 61072724533 is 33542727016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31706075844 + 29366648689 = 178062^2 + 171367^2 .

It is a cyclic number.

It is not a de Polignac number, because 61072724533 - 2²¹ = 61070627381 is a prime.

It is a super-4 number, since 4×61072724533⁴ (a number of 44 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61072724539) 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 as a sum of consecutive naturals, namely, 30536362266 + 30536362267.

It is an arithmetic number, because the mean of its divisors is an integer number (30536362267).

Almost surely, 2^61072724533 is an apocalyptic number.

It is an amenable number.

61072724533 is a deficient number, since it is larger than the sum of its proper divisors (1).

61072724533 is an equidigital number, since it uses as much as digits as its factorization.

61072724533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 61072724533 in words is "sixty-one billion, seventy-two million, seven hundred twenty-four thousand, five hundred thirty-three".