61221350105456 has 30 divisors (see below), whose sum is σ = 123997826678040. Its totient is φ = 29279776133344.

The previous prime is 61221350105431. The next prime is 61221350105501. The reversal of 61221350105456 is 65450105312216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3616564676 + ... + 3616581603.

It is an arithmetic number, because the mean of its divisors is an integer number (4133260889268).

Almost surely, 2^{61221350105456} is an apocalyptic number.

It is an amenable number.

61221350105456 is an abundant number, since it is smaller than the sum of its proper divisors (62776476572584).

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

61221350105456 is a wasteful number, since it uses less digits than its factorization.

61221350105456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7233146333 (or 7233146304 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 61221350105456 in words is "sixty-one trillion, two hundred twenty-one billion, three hundred fifty million, one hundred five thousand, four hundred fifty-six".