61697800845 has 24 divisors (see below), whose sum is σ = 110903703456. Its totient is φ = 32905493136.

The previous prime is 61697800841. The next prime is 61697800861. The reversal of 61697800845 is 54800879616.

It is not a de Polignac number, because 61697800845 - 2² = 61697800841 is a prime.

It is a super-3 number, since 3×61697800845³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61697800791 and 61697800800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61697800841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25388827 + ... + 25391256.

It is an arithmetic number, because the mean of its divisors is an integer number (4620987644).

Almost surely, 2^61697800845 is an apocalyptic number.

It is an amenable number.

61697800845 is a deficient number, since it is larger than the sum of its proper divisors (49205902611).

61697800845 is an equidigital number, since it uses as much as digits as its factorization.

61697800845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50780103 (or 50780091 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 61697800845 in words is "sixty-one billion, six hundred ninety-seven million, eight hundred thousand, eight hundred forty-five".