61645054616 has 32 divisors (see below), whose sum is σ = 116572737600. Its totient is φ = 30559420320.

The previous prime is 61645054579. The next prime is 61645054693.

61645054616 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×61645054616² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1150715 + ... + 1203093.

It is an arithmetic number, because the mean of its divisors is an integer number (3642898050).

Almost surely, 2^61645054616 is an apocalyptic number.

It is an amenable number.

61645054616 is a deficient number, since it is larger than the sum of its proper divisors (54927682984).

61645054616 is a wasteful number, since it uses less digits than its factorization.

61645054616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53639 (or 53635 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 61645054616 in words is "sixty-one billion, six hundred forty-five million, fifty-four thousand, six hundred sixteen".