61475110657 has 4 divisors (see below), whose sum is σ = 61485075540. Its totient is φ = 61465145776.

The previous prime is 61475110651. The next prime is 61475110667. The reversal of 61475110657 is 75601157416.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 762643456 + 60712467201 = 27616^2 + 246399^2 .

It is a cyclic number.

It is not a de Polignac number, because 61475110657 - 2¹⁵ = 61475077889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61475110651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4973182 + ... + 4985527.

It is an arithmetic number, because the mean of its divisors is an integer number (15371268885).

Almost surely, 2^61475110657 is an apocalyptic number.

It is an amenable number.

61475110657 is a deficient number, since it is larger than the sum of its proper divisors (9964883).

61475110657 is an equidigital number, since it uses as much as digits as its factorization.

61475110657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9964882.

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 61475110657 in words is "sixty-one billion, four hundred seventy-five million, one hundred ten thousand, six hundred fifty-seven".