61458680417 has 4 divisors (see below), whose sum is σ = 61461804036. Its totient is φ = 61455556800.

The previous prime is 61458680401. The next prime is 61458680461. The reversal of 61458680417 is 71408685416.

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 5792884321 + 55665796096 = 76111^2 + 235936^2 .

It is a cyclic number.

It is not a de Polignac number, because 61458680417 - 2⁴ = 61458680401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61458680497) 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, 1532108 + ... + 1571709.

It is an arithmetic number, because the mean of its divisors is an integer number (15365451009).

Almost surely, 2^61458680417 is an apocalyptic number.

It is an amenable number.

61458680417 is a deficient number, since it is larger than the sum of its proper divisors (3123619).

61458680417 is a wasteful number, since it uses less digits than its factorization.

61458680417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123618.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 61458680417 in words is "sixty-one billion, four hundred fifty-eight million, six hundred eighty thousand, four hundred seventeen".