61645056788852 has 48 divisors (see below), whose sum is σ = 110249953464000. Its totient is φ = 30152559018240.

The previous prime is 61645056788849. The next prime is 61645056788867. The reversal of 61645056788852 is 25888765054616.

It is a super-2 number, since 2×61645056788852² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29038799 + ... + 31089257.

It is an arithmetic number, because the mean of its divisors is an integer number (2296874030500).

Almost surely, 2^{61645056788852} is an apocalyptic number.

It is an amenable number.

61645056788852 is a deficient number, since it is larger than the sum of its proper divisors (48604896675148).

61645056788852 is a wasteful number, since it uses less digits than its factorization.

61645056788852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051376 (or 2051374 counting only the distinct ones).

The product of its (nonzero) digits is 774144000, while the sum is 71.

The spelling of 61645056788852 in words is "sixty-one trillion, six hundred forty-five billion, fifty-six million, seven hundred eighty-eight thousand, eight hundred fifty-two".