61501511593 has 2 divisors, whose sum is σ = 61501511594. Its totient is φ = 61501511592.

The previous prime is 61501511531. The next prime is 61501511623. The reversal of 61501511593 is 39511510516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60936403609 + 565107984 = 246853^2 + 23772^2 .

It is a cyclic number.

It is not a de Polignac number, because 61501511593 - 2³³ = 52911577001 is a prime.

It is not a weakly prime, because it can be changed into another prime (61501541593) 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, 30750755796 + 30750755797.

It is an arithmetic number, because the mean of its divisors is an integer number (30750755797).

Almost surely, 2^61501511593 is an apocalyptic number.

It is an amenable number.

61501511593 is a deficient number, since it is larger than the sum of its proper divisors (1).

61501511593 is an equidigital number, since it uses as much as digits as its factorization.

61501511593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20250, while the sum is 37.

The spelling of 61501511593 in words is "sixty-one billion, five hundred one million, five hundred eleven thousand, five hundred ninety-three".