61448267541820 has 24 divisors (see below), whose sum is σ = 130491264783600. Its totient is φ = 24303135027072.

The previous prime is 61448267541809. The next prime is 61448267541877. The reversal of 61448267541820 is 2814576284416.

61448267541820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17260747530 + ... + 17260751089.

It is an arithmetic number, because the mean of its divisors is an integer number (5437136032650).

Almost surely, 2^{61448267541820} is an apocalyptic number.

It is an amenable number.

61448267541820 is an abundant number, since it is smaller than the sum of its proper divisors (69042997241780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61448267541820 is a wasteful number, since it uses less digits than its factorization.

61448267541820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34521498717 (or 34521498715 counting only the distinct ones).

The product of its (nonzero) digits is 20643840, while the sum is 58.

The spelling of 61448267541820 in words is "sixty-one trillion, four hundred forty-eight billion, two hundred sixty-seven million, five hundred forty-one thousand, eight hundred twenty".