60556600991 has 2 divisors, whose sum is σ = 60556600992. Its totient is φ = 60556600990.

The previous prime is 60556600963. The next prime is 60556601003. The reversal of 60556600991 is 19900665506.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 60556600991 - 2³⁰ = 59482859167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60556600691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30278300495 + 30278300496.

It is an arithmetic number, because the mean of its divisors is an integer number (30278300496).

Almost surely, 2^60556600991 is an apocalyptic number.

60556600991 is a deficient number, since it is larger than the sum of its proper divisors (1).

60556600991 is an equidigital number, since it uses as much as digits as its factorization.

60556600991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 437400, while the sum is 47.

The spelling of 60556600991 in words is "sixty billion, five hundred fifty-six million, six hundred thousand, nine hundred ninety-one".