61545371265044 has 12 divisors (see below), whose sum is σ = 107704470867924. Its totient is φ = 30772665302784.

The previous prime is 61545371265043. The next prime is 61545371265149. The reversal of 61545371265044 is 44056217354516.

It can be written as a sum of positive squares in 2 ways, for example, as 27355389536644 + 34189981728400 = 5230238^2 + 5847220^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61545371265043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3245234 + ... + 11559510.

It is an arithmetic number, because the mean of its divisors is an integer number (8975372572327).

Almost surely, 2^{61545371265044} is an apocalyptic number.

It is an amenable number.

61545371265044 is a deficient number, since it is larger than the sum of its proper divisors (46159099602880).

61545371265044 is a wasteful number, since it uses less digits than its factorization.

61545371265044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10164874 (or 10164872 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 53.

The spelling of 61545371265044 in words is "sixty-one trillion, five hundred forty-five billion, three hundred seventy-one million, two hundred sixty-five thousand, forty-four".