61175563897 has 16 divisors (see below), whose sum is σ = 72238415872. Its totient is φ = 50696778960.

The previous prime is 61175563849. The next prime is 61175563913. The reversal of 61175563897 is 79836557116.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61175563897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61175563997) 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 in 15 ways as a sum of consecutive naturals, for example, 98068 + ... + 363274.

It is an arithmetic number, because the mean of its divisors is an integer number (4514900992).

Almost surely, 2^61175563897 is an apocalyptic number.

It is an amenable number.

61175563897 is a deficient number, since it is larger than the sum of its proper divisors (11062851975).

61175563897 is a wasteful number, since it uses less digits than its factorization.

61175563897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266308.

The product of its digits is 9525600, while the sum is 58.

The spelling of 61175563897 in words is "sixty-one billion, one hundred seventy-five million, five hundred sixty-three thousand, eight hundred ninety-seven".