61725569527 has 2 divisors, whose sum is σ = 61725569528. Its totient is φ = 61725569526.

The previous prime is 61725569513. The next prime is 61725569533. The reversal of 61725569527 is 72596552716.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61725569527 is a prime.

It is a super-2 number, since 2×61725569527² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61725569537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30862784763 + 30862784764.

It is an arithmetic number, because the mean of its divisors is an integer number (30862784764).

Almost surely, 2^61725569527 is an apocalyptic number.

61725569527 is a deficient number, since it is larger than the sum of its proper divisors (1).

61725569527 is an equidigital number, since it uses as much as digits as its factorization.

61725569527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7938000, while the sum is 55.

The spelling of 61725569527 in words is "sixty-one billion, seven hundred twenty-five million, five hundred sixty-nine thousand, five hundred twenty-seven".