61105313544 has 32 divisors (see below), whose sum is σ = 166650855840. Its totient is φ = 18516761600.

The previous prime is 61105313543. The next prime is 61105313561. The reversal of 61105313544 is 44531350116.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (61105313543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115729497 + ... + 115730024.

It is an arithmetic number, because the mean of its divisors is an integer number (5207839245).

Almost surely, 2^61105313544 is an apocalyptic number.

It is an amenable number.

61105313544 is an abundant number, since it is smaller than the sum of its proper divisors (105545542296).

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

61105313544 is a wasteful number, since it uses less digits than its factorization.

61105313544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231459541 (or 231459537 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 61105313544 in words is "sixty-one billion, one hundred five million, three hundred thirteen thousand, five hundred forty-four".