97561249619 has 2 divisors, whose sum is σ = 97561249620. Its totient is φ = 97561249618.

The previous prime is 97561249601. The next prime is 97561249627. The reversal of 97561249619 is 91694216579.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97561249619 is a prime.

It is a super-2 number, since 2×97561249619² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97561249699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48780624809 + 48780624810.

It is an arithmetic number, because the mean of its divisors is an integer number (48780624810).

Almost surely, 2^97561249619 is an apocalyptic number.

97561249619 is a deficient number, since it is larger than the sum of its proper divisors (1).

97561249619 is an equidigital number, since it uses as much as digits as its factorization.

97561249619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 59.

The spelling of 97561249619 in words is "ninety-seven billion, five hundred sixty-one million, two hundred forty-nine thousand, six hundred nineteen".